Patrick Peterson's week to break out?

The Arizona Cardinals' Patrick Peterson tied an NFL record with four punt returns for touchdowns last season.

The Philadelphia Eagles held him to a 4.5-yard average on six returns in their November meeting, however. This season, Peterson has yet to break a return longer than 17 yards through two games as the Cardinals prepare to face the Eagles in Week 3.

Peterson, who earned Pro Bowl honors as a rookie returner in 2011, went into this season focused on improving as a cornerback. He has done that. A groin injury made him questionable against New England in Week 2, but Peterson still picked off a pass and provided solid coverage. He wasn't on the injury report Wednesday.

Adam Grigely of ESPN Stats & Information, in debating Marty Callinan, points to special teams as one area where the Cardinals should have the advantage Sunday. Arizona blocked a field-goal try against Seattle in Week 1. The Cardinals blocked a punt against New England in Week 2.

Grigely: "In 2012, the Cardinals are tied for fifth in the NFL with a 6.9 Special Teams EPA (total expected points by special teams); the Eagles are 31st in that category. Peterson leads the league with four punt return touchdowns since the start of last season."

The Eagles allowed a 23-yard punt return to Cleveland's Josh Cribbs in Week 1.