Did Randy Moss play in any of those 47 games?
I'm not going to do the research for you (I don't have past target data), but I'm sure if you look you can find lots of RBs with better than a 3/47 20+ carry ratio who also had a WR with Moss-like targets. I'm thinking, real quick off the top of my head --
Ricky Watters -- Jerry Rice
Emmitt Smith -- Michael Irvin
Or how about Cincinnati in 2004?
Rudi Johnson (16 GP, 11 games with more than 20 carries -- Chad Johnson (league leader with 158 targets)
The fact is that the Vikings have chosen to
split carries when Bennett has played, and it's got nothing to do with Moss.