re: Roy Williams: Michael Jordan ran a sub 4.4 40 in college

You are very close. I coached track for many years and the conversion is to round up the hundredths (even a 4.31 becomes a 4.4), then add .24. With this formula, he ran a “real” 4.64.

With that being said, the formula was devised by using extremely experienced Olympic level timers. I ran our high school electronic timing system for years. We hired hand held backup timers in case of a malfunction. I’d compare those hand held times to the FAT time and they were consistently .4 to .5 faster than electronic. Having said that, MJ probably ran around a 4.8 electronic time.