It's unclear when Rivers suffered the head injury. On his final play of the game, Rivers threw a deep interception to Jags corner A.J. Bouye and then proceeded to deck Bouye out of bounds to prevent a game-winning pick-six. Rivers was not sacked by the self-proclaimed "Sacksonville" defense, but did take five QB hits. Rivers finished with 235 yards, two touchdowns and an interception in the 20-17 loss.
The 35-year-old has not shown up on the injury report this year and has not displayed concrete signs of physical deterioration. In fact, he hasn't missed a game since taking over the Chargers' starting role from Drew Brees in 2006. The Chargers ironman has started 185 consecutive games, the second-best active streak behind draft mate Eli Manning (208) and the fourth-best all time.
For a 3-6 Chargers club teetering on the verge of elimination from playoff contention, Rivers' health will be something to monitor.