I guess if we look at historical context, here's the last few running backs to finish in the top 4 of voting:
2013: Andre Williams (2,177 yards, 18 TDs, 7-6 team - finished fourth in voting)
2011: Trent Richardson (1,679 yards, 21 TDs, 12-1 team - finished third in voting)
2011: Montee Ball (1,923 yards, 33 TDs, 11-3 team - finished fourth in voting)
2010: Lamichael James (1,731 yards, 21 TDs, 12-1 team - finished third in voting)
2009: Mark Ingram (1,658 yards, 17 TDs, 14-0 team - finished first in voting)
2009: Toby Gerhart (1,871 yards, 28 TDs, 8-5 team - finished second in voting)
Cobb is on pace right now to rush for 1,751 yards and 13 TDs in a 13-game season. So, unless Cobb starts performing better (I know, tough to imagine, but we're talking about a really high bar here) I don't think he'd be near the top of the conversation, even with a 9-3 or 10-2 team.