 Keeping some slim playoff hopes alive, the Bills stayed home, donned their throwback jerseys again and faced a fierce Week 13 challenge against the San Diego Chargers.In the first quarter, the Chargers struck first with kicker Nate Kaeding getting a 42-yard FG, while LaDainian Tomlinson got a 51-yard run.In the second quarter, Buffalo continued to struggle as Philip Rivers completed an 11-yard pass to Antonio Gates for the only score of the period.