The potential of the Allstars are pretty much
Jump Shot: mediocre Jump Range: atrocious
Outside Def.: atrocious Handling: average
Driving: atrocious Passing: atrocious
Inside Shot: marvelous Inside Def.: tremendous
Rebounding: tremendous Shot Blocking: average
Stamina: respectable Free Throw: inept
or
Jump Shot: sensational Jump Range: atrocious
Outside Def.: strong Handling: awful
Driving: mediocre Passing: atrocious
Inside Shot: marvelous Inside Def.: wondrous
Rebounding: prolific Shot Blocking: mediocre
Stamina: strong Free Throw: strong
Just 2 examples of a strictly C, or a PF.
So to get the max out his potential my suggestion is to get his IS/ID/RE around 13 or a similar combination that you like in sum of 39, work his DR (just to help his HA, even better if you just train HA directly), then JS/OD to create a very good PF with low salary.
His SB is very high and it doesnt help...