Single-season interceptions
Ronnie Lott and Dave Baker: 10
Baker set the record in 1960, and Lott tied it in 1986. While NFL offenses are starting to lean more on the passing game, passing concepts are getting more advanced and more players are being targeted by quarterbacks. That makes racking up INTs more difficult for defenders. No player has reached 10 interceptions since Antonio Cromartie in 2007, and no player has eclipsed that mark since Everson Walls had 11 for Dallas in 1981. For the 49ers, they haven’t had a player post more than five INTs since 2011.