Koji was the easy ALCS MVP: 1 win, 3 saves ... and (the key) two extreme-leverage saves. (you don't give him as much credit for the clincher, holding a 3 run lead for 3 outs is something he can do in his sleep)
Here Uehara has been less urgent - 2 run leads both times, though last night the four out save. There are better candidates.
Ortiz has BEEN the Red Sox offense for long stretches this series - Lester has given 2 dominant starts, but Game 1 was also a blowout. Doesn't reduce the effectiveness of the starts, but it might be enough to inch Ortiz ahead of him. After all, a guy batting .700 in a 6-game series is pretty insane.