Michael Beasley is one I think needs to be focused and work extra hard. Any rookie, who is not used to the NBA lifestyle, and who has of yet, really doesn't have any friends on the team he was drafted too. Also, any player coming off a major injury, who will now not have any support to recover.
He actually has been working out quite a lot with Tim Grover, so hopefully he keeps working with him.
Big Baby is on the radar. Can see Al Jefferson for some reason, seems to fit that Shawn Kemp / Vin Baker mold.