National Football League

Rams rookie QB shaken up

Published Jan. 3, 2010 8:27 p.m. ET

foxsports

St. Louis Rams quarterback Keith Null has been replaced in the third quarter against the San Francisco 49ers after being shaken up. The team said his return was questionable.

Null is 7 for 17 for 57 yards and has been sacked five times. He made his fourth straight start Sunday for the 1-14 Rams, but Kyle Boller entered midway through the quarter with St. Louis trailing 7-3.

It wasn't clear when Null was hurt.

Boller made his first appearance since Dec. 6, when he started in a loss at Chicago. He was sidelined the next two weeks due to a thigh injury and serious bout of flu.