He wasn't the best ball handler. He was a 2 ft jumper and rarely ever drove the ball, those guys usually don't make it far. Meeks was this way as well. Almost like they had to gather themselves before leapingI think things came too easily for him. He was a supreme physical specimen, 6'6", 210, tremendous leaper, tremendous straight-line speed. Not far off Vince Carter, who was in the same HS class (and most rated Mercer ahead of him at that time).
Mercer turned into a mid-range guy, because he could always elevate and get that shot off (and he was really good at it), and I don't think he particularly liked contact (low FT rates) When he got to the NBA he entered bad situations (bad Pitino Celtics and post-Jordan Bulls), put up some decent numbers, but never really developed a game off the dribble (unlike Derek Anderson) or NBA 3 point range. Then he started getting leg injuries that sapped his athleticism, so his career was fairly short.
Mercer was an unbelievable college player though