To reference someone else that had little (actually zero) experience at the tight end position: Antonio Gates. Gates was 6'4, 255 lbs, ran the 40 in 4.50 seconds (same as Croom), and had a vertical of 39 inches. Croom could jump just 31.5 inches, but that was also reported only when he was coming out of high school. I would wager he could vert at least 35inches now. Also, Gates played basketball in college so jumping was kind of his bag. Could definitely see Croom having a lot of success at the next level, if he can stay healthy.