Wide receiver Eddie Royal and the San Diego Chargers stiff-armed the San Francisco 49ers and defensive back Chris Culliver on Saturday night in Santa Clara, Calif., keeping the Chargers’ slim playoff hopes alive.
Wide receiver Eddie Royal and the San Diego Chargers stiff-armed the San Francisco 49ers and defensive back Chris Culliver on Saturday night in Santa Clara, Calif., keeping the Chargers’ slim playoff hopes alive.Marcio Jose Sanchez/Associated Press

Rivers threw a tying 11-yard touchdown pass to Malcom Floyd with 29 seconds left in regulation after completing a pair of fourth-and-longs as the Chargers forced overtime.

Phil Dawson’s 60-yard field goal attempt for San Francisco as regulation ended fell way short. Quinton Patton fumbled in overtime to set up San Diego’s winning drive.

Rivers converted fourth-and-8 and fourth-and-10 on the key final San Diego drive of the fourth quarter.

The 49ers blew just their second game when leading by 21 or more at halftime. They lost 42-41 to Minnesota on Oct. 24, 1965, after leading 35-14 at halftime.