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Carl Valle


How fast did he go?

One of the biggest sports legends is Bo Jackson, an athlete who was an excellent football and baseball player in the 80s and early 90s, before a hip injury cut off his athletic career short. His highlights were memorable, gunning down runners with a rocket arm, running up walls to make amazing catches, and rushing out of the stadium on Monday Night football against Seattle. Tied to his legendary status, was his well-publicized 40 yard dash time, reportedly 4.12. After months of trying to dig up relevant details, it seems his performance is still shrouded in mystery with some factors of how he was timed. In this article, we use all the evidence we can get; some of it is questionable and some of it very strong in an attempt to figure out if Bo Jackson had the ability to run a 4.12?

ESPN Bo Jackson Tweet

Figure 1: ESPN Tweets Bo Jackson’s 40 Time during NFL Combine.

Looking at the Evidence

The fastest man on the planet, Usain Bolt, is the standard to running both the 100 m and the first 40 yards. We already broke down what Bolt could have run with ideal conditions, so the question is what do we know of Bo Jackson’s times as he was a great track athlete while at Auburn. I have done a long investigation and research into finding substantial documentation of electronic timing and found just Wikipedia and the Media Guide to Auburn Track and Field. The available information is scant, but we have enough data points to make an argument that Jackson was likely not running faster than any sprinter, and he may not be the fastest football player ever, either. While he is an amazing talent, he simply is not faster, with the available performances to make the claim he ran a 4.12. While it may have been timed in the Superdome by hand or even partially electronically, his track and field performances simply don’t indicate he could have run faster than Usain Bolt.

Auburn 55 Meter All-time List

Exhibit A: All-Time list at Auburn. Note Bo Jackson highlighted in 1983 with a 6.18 in the 55 meters.

While one time does not prove one’s ability, it does create a case to ask whether this time is likely to be an indicator of what he was able to do. Backing up those two times are the 50 m and 100 m times listed in Wikipedia, which are not strong evidence, but are enough to support the performance recorded in the Auburn media guide. Based on the Wikipedia entry, the claim is that Jackson ran 5.78 on January 29, 1984 in the 50 m and 10.39 in the 100 m. Bo’s performance in Tallahassee, Florida in March of that year was rumored to be slightly wind-assisted but still legal, making his 100 m match his acceleration abilities. While the 100 m is a different animal than the 40 yard dash, it does show if the athlete is a pure accelerator or slightly more elastic to run faster the last 10 yards. All three indicated times reinforce each other, and none indicates any potential to be faster than Bolt’s ability, no matter how raw Bo Jackson’s training or experience in Track and Field was. Jackson did compete in high school, and while he was an excellent athlete, there are no indications to point out that he ran anything world class either.

How do We Project Bo Jackson’s 40 Time?

A few arguments can be made to simply state that Bo was a team sport athlete and more of a pure accelerator. Anything longer than 30 m was simply not sport specific, and he had uncanny early speed. The shortest distance being 50 m and it being just a random meet versus the combine, one can pose a good argument that his 55 m and 50 m times were just too long. Perhaps he was world class at 36.5 meters and slowed down greatly the next 10-15 meters. He was a big guy at 225, but why again was he famous for long runs against Deion Sanders in college and running a professional league touchdown into the tunnel of the Seattle Kingdome? His 100 m time would be closer to 11 seconds rather than 10! Also, Bo Jackson was elastic as he competed in the jumping events in high school with great success, so I doubt he was a drop dead sprinter after 40 yards. Perhaps those two performances in college were impaired runs, meaning he did not run all out because of a slight injury like a calf cramp or hamstring strain. With such a small sample size, I will give Bo the benefit of the doubt to say he could have run faster, but being so far behind on the 55 m dash list, I am not a believer.

Instead of working backwards to project a 40 yard dash, what would someone likely need to do at the combine to run a 4.12? It was very unlikely that they timed it electronically but very likely they looked at first movement and estimated his finish using a stopwatch. A great aspect of a football field is that the sport is measured and labeled on the field, making me wonder why people are so reliant on GPS technology with scripted plays, but that is another story. I believe that the distance was accurate, but the timing was by hand or some kind of electronic finish but combined with a hand start. Electronic timing was available at that time (mid 1980s) and Bo claims he was electronically timed. With no records besides Bo Jackson saying so on TV, we cannot truly state with confidence that it really happened. Let’s project out the world records as well as the splits of Usain Bolt, since the 50 m and 55 m times are rarely run now, and even indoor competition is less participated by elites.

Usain Bolt / Bo Jackson Sprint Time Comparisons

Exhibit B: Bo Jackson, Usain Bolt, and world record holders in the short sprints compared. Either splits (Usain) or best performances are displayed.

Looking at the above chart requires some interpretation context since the NFL 40 yard dash and track sprint events are timed differently. Remember from the Usain Bolt 40 yard dash article the difference between running time, running time with reaction time, and the NFL combine is that each measurement is different. Track and Field starts timing as soon as the gun goes off, meaning the athlete must react to the sound, and this is a little over a tenth of a second on average. In Track and Field, the athlete’s running time is added to the reaction time as they measure the running through the finish line with a camera. Since the reaction time is based on forces triggered on the starting blocks, one can see the running performance compared to the total time, as some athletes have a bad reaction, and even though their actual time from first motion to finish is impressive, the event cares only about everyone starting at the same time from a gun. In the NFL combine, each athlete runs multiple times by himself, and instead of an athlete reacting to a gun, a starter is reacting to the athlete’s first movement, something very prone to human error. Most of the time, the starter is late because most brains will start only after a strong visual confirmation of movement, and that is likely to be total distance moved, likely giving the athlete a time cushion. Therefore, when reading the yellow highlighted times, we are assuming that, somehow, the mid-1980s used a currently-used NFL timing setup and adjusted Usain Bolt’s running time by subtracting 0.1 seconds.

The chart has several colors to represent strength of evidence, or lack of it. The white cells are what is documented, and the light gray cells are what is calculated based on standard formulas. The near-black zones simply represent the splits or total times that are currently unknown. Looking at the comparison of splits and all time best performances, it seems the only matching performance is the 40 yard dash, assuming that it was done properly. If it were hand time, Bo’s conversion would be slower, and Bolts would be adjusted to be faster, creating a two tenth gap. All we have is Bo Jackson’s memory of being electronically timed and our knowledge of how combines are currently tested.

The Baseball Scouting Report

Baseball scouting is not much different than a beauty pageant in terms of accurate evaluation back in the 1980s, but we still can get a good reading on if Bo was doing something special then. Not much has changed with MLB scouting in terms of what the teams are looking for, and the report is very damaging to the legend of monumental speed. Bo was an amazing athlete, but the scouting report showed that he did not hit the top rating in speed while tested. Projecting his speed was a conjecture as some athletes do not improve as much, but the most damning evidence was his 4.1 time to first base performance. With so many sub 4 second performances done by many athletes, why isn’t this 90 foot sprint freaky? Even if it was hand timed with a stopwatch, we should be seeing at least 3.8 and 3.9 – indicators of impressive speed. A 4.1 time in a 30 yard sprint when he supposedly ran a 4.1 for 40 yards does not add up.

Bo Jackson Scouting Report

Exhibit C: Scouting Report on Bo Jackson indicating a 4.1 running time to first base.

A few readers will be familiar with scouting baseball player’s speeds, but for many, the running time to 1st base has some nuances that must be broken down into more detail. First, the time is not a flat 30-yard sprint from home to first base since it is a summary of the typical situation of a hitter swinging and making contact with the ball and then running to the bag. Several details are important here, because right handed hitters and left handed hitters are two separate athletes to baseball scouts for many reasons. For speed purposes, left-handed athletes are swinging and finishing towards the first base direction and naturally roll into that direction while right-handed batters factor in an additional tenth. I do not totally agree with that unit of measurement because each athlete is different, and after reading research of entire teams of MLB players running faster than Usain Bolt, I am not confident that even Major League Baseball can communicate correct speeds and distances accurately.

Billy Hamilton, according to “league sources” ran 3.3 to first base, an apparent record according to the Reds. The problem is that while it is likely to be less than 30 yards because of the bag being the mark instead of his center of mass, Billy is a switch hitter and time must be added. Even if all of this was true and he has 3.4 adjusted speed to the bunt he did in March, why didn’t Bo run 3.7 or 3.8 if he is a 4.12 combine performer. No video of him playing ever showed legendary time to first, and with baseball having high sampling opportunities, it leads us to believe that the combine time was simply hand timing and Bo was just fast, but not legendary.

Parting Thoughts on Bo Jackson

More evidence is sure to pop up as fans want closure on the subject, and we will really never know for sure unless hidden film is found in some storage facility of a marked 40 yard dash and is broken down by some sport scientist. He, in my opinion, was timed by hand and the time was reported to him verbally. If for some miracle, electronic timing was done and it recorded the performance as a 4.12, we are likely to have been robbed the greatest athlete in American history, and should be grateful of his few years of play years ago. What is important to take from this article is that sport is about definitions and speed is relative, so do your homework to ensure one is speaking the same language. Who knows what can happen on a given day as many feats of sport are flashes in the pan, but if I was a better man here I would not put my money of Bo against the clock that was reported.

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Related Topics

How Fast can Usain Bolt Run the 40 Yard Dash?

How Can I Improve My 40 Yard Dash Time?

A Review of Al Vermeil Techniques for a Faster 40 Yard Dash


  • Ryan Boley says:


    Watch Bo Jackson’s first at bat on YouTube. It sure seems like it is well under 4 seconds. Also, remember Bo Jackson is self described as a Hustle player. I take that to mean when the big moment presented itself he had an amazing performance. Without a doubt he is the greatest athlete you or I have seen. And he would only lose to Usain on the track not on the diamond or grid iron.

    Thanks for your consideration.


  • Bo says:

    Bolt is not the fastest guy out of the blocks. You can see the he accelerates thru the middle of the 100m and his best race is the 200m. I am sure there are several NFL guys who could beat Bolt out of the blocks but obviously within 20 yards or less he would catch and pass most all of them.

  • Anonymous says:

    Bolt generally doesn’t separate from the pack until the 50-60 meter mark at full stride.

  • Anonymous says:

    Take Bo’s 55m time. 6.18. Convert meters to yards. 55 x 1.0936= 60.148 Take 6.18 and divide it by 60.148. You get 0.102746. Multiply 0.102746 x 40 and you get 4.10984. I’d say it’s very likely that Bo ran it in 4.12. This article is a waste of the writers time. Bo KNOWS the 40yd dash!

    • The first several meters of a sprint acceleration are considerably slower than the last several meters. Therefore, using a straight-line conversion to calculate the 40-yard dash given the athlete’s performance in the 55-meter dash will under-report the time by a considerable margin. In fact, the error will be much greater than the six digits of precision you included in your conversion factors. As an aside, one of the reasons I wrote the code for the ASR Sprint Calculator is because straight-line conversions of short fly times (e.g. 30m fly to 50m fly) has a modest error, and the error in converting short accelerations (e.g. 55m to 40yd) using straight-line conversion is considerably larger.

  • Charles Sinacole says:

    Bo’s times in the 40 and the 100 be them stuff of legend or not, isn’t for us to decide is it ? Bo was a legendary performer, who played 2 sports and was an MVP at both. He was larger than life, God made only one of him, sure there were the Hershey Walkers and many others that rivaled these men, but there was never the combination of size and speed and sheer natural ability that there was in Vincent “Bo” Jackson.

    • Anonymous says:

      Bo did a lit lot of things, but he’s never won an NFL or MLB MVP for any season. He got an all-star game MVP and made the Pro-Bowl once, but that’s the closest he came to being the league’s most valuable player at the pro level. I have no doubt that Bo would have won multiple NFL player of the year awards had he not been injured.

  • Charles Sinacole says:

    Today they would think this man is on drugs ( steroids) , too bad their wrong. This man had it all, size, strength,speed, and natural ability. There’s not to many records that wouldn’t have his name on them had he never been hurt. None, Bo was one gifted man who we mere mortals will never see the likes of again.

  • Jeremy says:

    Hello, and thank you for the great article. I appreciate the time and effort you put into your statistics, but you are leaving out the most important factor. The “what the heck just happened” factor. I will give an example. I was by no means a world class athlete, but was respectable in track and field. My day to day 400 meter time, electronic, was about 50 seconds. Slow by many standards. In a 400 meter relay split i was consistantly at about 48.5 seconds. However, there was that one time. I ran a 48 second ,electronic, 400 meter. I was also timed and 46.8 split on another day, but never again came close to either of those times again. I could show many many times where athletes broke world records and missed them being legit by a mere 2 centimeters at the foul line. Every athlete has that once in a lifetime “wow” moment. Bo Jackson may be a legit 4.2 guy, but I am hard pressed to refute that on that given day he ran a 4.12. You cannot leave out the human factor while amassing your stats. The stats do not give the whole truth and certainly cannot point to that single moment in time where everything went right. Again, thanks for the article but, your stats cannot give an accurate look at what 40 time Bo could have run a 40 meter, ON THAT ONE DAY. Thanks.

  • Graham says:

    Thanks for the article, but can you be more specific about his road to success. I’m writing an essay about him and need more details.

  • Kperk says:

    You lost a LOT of credibility when you discounted a lefty’s huge advantage running to first base. You’ve obviously never played. Also, lets say Bo’s 40 time is off. Are you saying it was off by more than a full second? Even if it was off by a full second it’s still faster than little johnson. By the way, maybe it was off in the other direction. Maybe he ran a 4 flat.

  • 4.12 says:

    It seems like you have put a lot of effort in trying to debunk Bo Jackson’s 4.12 40 yard dash. I don’t have an issue with the technicality aspect of time recording, as a matter of fact, we should all question what you don’t see with your own eyes. I bet its safe to say you were not at the Superdome to witness the run, right? ….. What I do have an issue with is your statement of, “If for some miracle, electronic timing was done and it recorded the performance as a 4.12, we are likely to have been robbed the greatest athlete in American history?” Robbed? Na brotha, I got to see that guy and his name was Bo Jackson. This statement stinks of a track and field bias towards other sports. Bo Jackson’s athletic abilities are a hell of lot closer to the term used by Mr. Valle, ” greatest athlete in American history” than any other athlete mentioned on this article. You cannot discredit Mr. Jacksons accomplishments, even though his careers lasted 8 years. Just because you run the fastest doesn’t make you the best athlete. When Bo Jackson played pro sports he made the best athletes look average. Remember, Bo Knows Haters… Mr. Valle!

  • Ken says:

    Bo ran a 4.13 40yd dash, electronically-timed, at the indoor facility on the Auburn University campus his senior year. They had to leave the door open on the other side because Bo Knows he can’t stop in that last 10 yards or so (the indoor facility is only 50 yards) due to the incredible momentum he has (see: Nonday Night Football LAR @ SEA). Bo didn’t even find out what his 40-time WAS until hours later, as he ran out the door…and didn’t stop until he got to Track Practice. True story.

  • Fidel B. says:

    I believe that 4.1 in the baseball scouting report should be a 3.1.

  • rol says:

    So You as a Non Track athlete I am assuming, are making an Assumption that Bo could NOT run faster than Bolt? Why? Bolt was ALWAYS slow in the first 40, then ran faster. Why, because of his long stride. My God that is silly to make a statement like that. Have You ever watched Any of Bolt races? If you truly did, you will then Know Bo can run Faster in a 40 than Bolt

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