What's the 49ers' biggest concern? 

September, 4, 2014
Sep 4
4:14
PM ET
The season can't come soon enough for the San Francisco 49ers. Put another way, the offseason can't end soon enough.

No matter how you look at it, the Niners will enter the 2014 season with many questions to answer on both sides of the ball, but the hits that have come defensively may be the biggest concern.