CINCINNATI -- Arizona Cardinals rookie cornerback Patrick Peterson suffered a left hamstring injury while making an interception Saturday and left in the third quarter of a 23-16 loss to the Cincinnati Bengals.
Peterson picked off Andy Dalton's underthrown pass and pulled up while running. He fell to the ground and grabbed his leg. The interception was nullified by a roughing-the-passer penalty.
Peterson did not return after suffering what the team originally deemed an Achilles injury. He wore a protective boot after the game.
"He's got a strain, it's not a tear," coach Ken Whisenhunt said. "We're fortunate that it doesn't appear to anything long term."
Peterson, the fifth overall pick, has tied the NFL record by returning four punts for touchdowns this season. He and Detroit's Jack Christiansen (1951) are the only rookies to run back four for touchdowns.
Information from The Associated Press contributed to this report.