He's a sprinter who ran in the mid 11s in his heyday (as a college senior in 2016) but still trains somewhat regularly and dropped a 24.2 and a 53.9 in two separate all comers meets earlier this year.
I'm a mediocre guy who might be able to squeeze out a 5 flat (my PR is 4:53) if the weather isn't too bad.
The question is, how fast can that guy run? He got a non-running related injury a few months ago and hasn't sprinted since then. But he picked up hobbyjogging to ward off the pounds. He averages around 15 MPW with a 30 minute "long run" (usually around 4 miles), though he's planning to "ramp up" to 16-18 MPW to prepare for the race.