Reasons for backup RB stealing carries?

[smm612]

My starting RB is considerably better than my backup. I have him 1st in depth chart (90%) & formations for everything but 3rd & short. Why then does my backup RB get roughly the same amount of carries as my #1? Is this solely because my starting RB endurance is mid-20s? Solutions?

[Front Office Midget]

Yes, that is the reason.

[ShaneTheMaster]

http://www.operationsports.com/fofc/showthread.php?t=62540

[Rizon]

I've found 20s is too low for a starting RB. I've also found that my RBs with 30s in endurance can handle about 15-20 carries a game before getting too tired.