I think the rookie will be the odd man out especially if at the time the rockets are in position to win the southwest division or pressing to make the playoffs. I love Chase, but at some point most rookies hit a wall with such a long 82 game season and I see that happening to Chase (this occurence is natural for rookies).
considering chase is 1 of our dead eye 3 point shooters and since t-mac doesnt replicate any of chase's skills (moving w/o the ball, running in transition, knocking down open 3's), i don't see t-mac getting much of budinger's minutes. he will most likely come in for battier/ariza.