Indianapolis Colts quarterback Andrew Luck, left, and Cincinnati Bengals quarterback Andy Dalton joke around during warmups before an NFL preseason football game, Thursday, Aug. 29, 2013, in Cincinnati. (AP Photo/Al Behrman)

Indianapolis Colts cornerback Darius Butler, left, breaks up a pass intended for wide receiver A.J. Green (18) in the end zone in the first half of an NFL preseason football game on Thursday, Aug. 29, 2013, in Cincinnati. Giovani Bernard scored on a 1-yard run on the next play. (AP Photo/Tom Uhlman)

Cincinnati Bengals linebacker J.K. Schaffer returns an interception in the second half of an NFL preseason football game against the Indianapolis Colts, Thursday, Aug. 29, 2013, in Cincinnati. (AP Photo/Tom Uhlman)

Cincinnati Bengals running back Rex Burkhead (33) runs for a 2-yard touchdown behind a block from tight end Alex Smith (81) in the second half of an NFL preseason football game against the Indianapolis Colts, Thursday, Aug. 29, 2013, in Cincinnati. (AP Photo/Tom Uhlman)

Indianapolis Colts quarterback Andrew Luck (12) watches from the sidelines in the second half of an NFL preseason football game against the Cincinnati Bengals, Thursday, Aug. 29, 2013, in Cincinnati. Luck did not play in the game. (AP Photo/Tom Uhlman)

Cincinnati Bengals linebacker J.K. Schaffer (50) helps up Indianapolis Colts quarterback Chandler Harnish (5) after Harnish was sacked in the first half of an NFL preseason football game on Thursday, Aug. 29, 2013, in Cincinnati. (AP Photo/Tom Uhlman)

Indianapolis Colts quarterback Chandler Harnish (5) is tackled by Cincinnati Bengals defensive end Dontay Moch (52) in the first half of an NFL preseason football game on Thursday, Aug. 29, 2013, in Cincinnati. (AP Photo/Tom Uhlman)

Indianapolis Colts wide receiver David Reed, left, is tackled by Cincinnati Bengals defensive end Wallace Gilberry in the first half of an NFL preseason football game on Thursday, Aug. 29, 2013, in Cincinnati. (AP Photo/David Kohl)