James suffered a hamstring strain Sunday, Adam Schefter of ESPN reports.

EDGE Analysis

Schefter says it's too early to tell if the injury is significant, but it sounds like James has some level of concern, as he threw his gloves in frustration before entering the medical tent, per Gilbert Manzano of The Orange County Register. He'll have exactly two weeks to return to health before the Chargers face the Bengals in Week 1 (Sept. 13).