Here are five things to know about San Francisco’s newest player.
1. He's reuniting with Chip Kelly
Lewis spent the 2015 season on the Philadelphia Eagles roster. The quarterback didn’t appear in any game last year, but a season’s worth of practices in Kelly’s offense should pay dividends for Lewis in San Francisco. Lewis told reporters during his introductory conference call that his familiarity with Kelly drew him to the Bay Area.
"I haven't been able to do that since my junior and senior year in college," Lewis said.