The San Francisco 49ers will start Jimmy Garoppolo at quarterback in Week 5.

Garoppolo suffered an ankle injury in the first quarter of the 49ers' Sept. 20 win against the New York Jets.

"He did a good job," Kyle Shanahan said. "Each day it got better, never felt too sore the next day, so we needed to hear that today and see him out there today, and we feel good to go and he'll be starting Sunday."

C.J. Beathard will serve as Garoppolo's backup this week after replacing Nick Mullens in the closing minutes of last weekend's loss.