Reggie Bush was brought in the offseason to provide a shifty change of pace and could siphon carries from Hyde early in the season. Bush played well at times last season, but health is always a risk with the former Heisman Trophy winner. Sooner or later, he'll be on the shelf again. Bush also isn't as big a pass-catching threat, despite what he's made out to be. The return of Kendall Hunter is Hyde's biggest threat on third downs and passing situations, but Hunter is coming off an ACL tear. The Niners also have fourth-round rookie Mike Davis.