In today's NFL about the only way you're sniffing 2,000 yards as a running back is if you have an average QB. If Romo is healthy I expect the Pass:Run ration to be 63:37
Starting QBs for teams with a 2,000 yard rusher:
1973 Bills: OJ Simpson - Starting QB: Joe Ferguson
1984 LA Rams: Eric Dickerson - Starting QB: Jeff Kemp
1997 Lions: Barry Sanders - Starting QB: Scott Mitchell
1998 Broncos: Terrell Davis - Starting QB: John Elway
2003 Ravens: Jamal Lewis - Starting QB: Kyle Boller
2009 Titans: Chris Johnson - Starting QBs: Vince Young and Kerry Collins
2012 Vikings: Adrian Peterson - Starting QB: Christian Ponder
An end of the line Elway is the best QB of the group.