Hessman has to be close to the all time leader in minor league HR's.
He is. In Toledo against the Mudhens, Bally gave up a solo HR to Hessman that was hit over the 40 ft tall scoreboard in left field onto the street in 2007 500 plus ft... The next time Bally faced Hessman,in the same game, with the game on the line , he struck him out on a 97 MPH fastball. That all said, I have never seen a ball hit any farther or longer than that shot in Toledo.