NFL Week 10: QB injury roundup

San Francisco 49ers quarterback Alex Smith left Sunday's 24-24 tie with the St. Louis Rams with a concussion. Smith took a hard shot from Rams linebacker Jo-Lonn Dunbar late in the first quarter, but remained in the game and completed five passes, including a touchdown pass to Michael Crabtree. Smith reportedly suffered the concussion while attempting a quarterback sneak on a fourth-and-1, but stayed in the game for six plays before completing ... more 

San Francisco 49ers quarterback Alex Smith left Sunday's 24-24 tie with the St. Louis Rams with a concussion. Smith took a hard shot from Rams linebacker Jo-Lonn Dunbar late in the first quarter, but remained in the game and completed five passes, including a touchdown pass to Michael Crabtree. Smith reportedly suffered the concussion while attempting a quarterback sneak on a fourth-and-1, but stayed in the game for six plays before completing the touchdown pass to Crabtree and giving way to 2011 second-round pick Colin Kaepernick. (Photo by Brian Bahr/Getty Images) less