49ers lose backup QB Thad Lewis to season-ending knee injury (Yahoo Sports)

San Francisco 49ers backup quarterback Thad Lewis will miss the entire season after tearing knee ligaments during an exhibition game. Coach Chip Kelly said Monday that Lewis tore his ACL on a scramble Sunday against Houston and will need season-ending surgery. Blaine Gabbert and Colin Kaepernick are competing for the starting job although Kaepernick did not throw the last two practices last week or play in the exhibition opener because of a sore throwing shoulder.