San Diego Chargers QB Philip Rivers battling back, chest injuriesSan Diego Chargers QB Philip Rivers did not practice Wednesday due to back and chest injuries.SI Staff|Share on FacebookShare on XAdd us as a preferred sourceSan Diego Chargers QB Philip Rivers did not practice Wednesday due to back and chest injuries.Published Dec 18, 2014 | Modified Dec 18, 2014SI STAFFShare on FacebookShare on XHome/NFL