The 49ers signed Alexander on March 13, and he has become a vocal leader on the defense. Alexander had five tackles and a forced fumble on Sunday at FedExField.
The Tampa Bay Buccaneers made Alexander a fourth-round selection out of LSU in 2015. He has registered 30 combined tackles, 0.5 sacks, four passes defensed, an interception, and a forced fumble through six starts with San Francisco this season.