How bad are Lewis' fumbles compared to other Patriots running backs, and what might explain them?

[Soul_Survivor88]

I posted this before but I'll post it again - isn't it possible that at least one of those fumbles was just a great play by a defender? At least on Sunday that fumble looked like a perfect punch to the ball (heh) by the defender.

Interesting observation. Here's a close up image of the fumble during the Bills game. Careless handling of the ball? Or great defensive play?