for a guy getting scrub minutes, he's not really hurting you with his stats...not a lot of tos or fouls, and his scoring (considering his PT) ain't that bad, and he's at least made 12 of his 30 free throws...I really doubt he'll leave from benching him, and I know he doesn't make you a lot better, but he's getting 8 mpg at more than just SF too from the looks of things, giving your starters and maybe more importantly 2nd unit a chance to stay fresher...
tl,dr I say play him at 3rd string like you have been then use tourney money to find someone else and cut him before signings if you can make it work...