49ers' David Mayo: Joins 49ers

Mayo (sports hernia) signed a two-year contract with the 49ers on Thursday, Matt Maiocco of NBC Sports Bay Area reports.

Mayo played all 16 games as a reserve linebacker with the Panthers last season, recording 14 tackles and one defended pass. The 25-year-old underwent sports hernia surgery earlier this offseason and is expected to make a full recovery prior to training camp.