Short people always want to be taller.
Zimmerman was measured at the SPD on two separate occasions -- 5'7" at one time and 5'8" at another, according to reports. Would that be 5"7 with his shoes off and 5'8" with them on or both on or both off???
Martin on his DL is listed at 6'00". He is probably 6'00" or taller with his shoes on, 5'11" on the ME table.
In short, there is, according to documented measurements, about a 4 inch height difference between them: 5'7" - 5'8" versus 5'11 - 6'00". In basketball and boxing, that is a substantial height and reach difference.