San Francisco backup quarterback Jeff Driskel warms up on Thursday, Sept. 1, 2016, in San Diego.
San Francisco backup quarterback Jeff Driskel warms up on Thursday, Sept. 1, 2016, in San Diego. Lenny Ignelzi The Associated Press
San Francisco backup quarterback Jeff Driskel warms up on Thursday, Sept. 1, 2016, in San Diego. Lenny Ignelzi The Associated Press