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

49ers notes: Driskel ends preseason with two interceptions

September 01, 2016 09:19 PM