NFC West Penalty Watch: Yardage leaders

Officials have not flagged Arizona Cardinals cornerback Patrick Peterson since calling a 20-yard interference penalty against him in Week 11.

2011 Most Penalty Yardage

San Francisco was the opponent that day. The 49ers are the opponent Sunday.

Peterson's matchup with the 49ers' Michael Crabtree will be one to watch after Crabtree caught seven passes for 120 yards against the Cardinals in Week 11.

The chart shows Peterson ranking second behind Seattle's Brandon Browner in penalty yardage this season. Browner, like Peterson, is an aggressive corner. They appear willing to trade flags for tight coverage that can take a receiver off his game.