For me, Sims came on strong late last year in the D league, and now has played extremely well this season... again, I don't view him as a "savior" or as a replacement for David Robinson, but I think he could contribute 10+ mpg as a center, basically replacing what the Spurs had hoped Mahinmi might be able to produce. If Mahinmi comes back this season, it sets up a battle between two young centers to see which one gets 12 mpg and which one gets, say, 3-5 mpg. I just don't see how guys like Tolliver or Vaughn are going to address this team's current weaknesses, whereas Sims-- even in very limited minutes-- possibly could.