Indianapolis Colts quarterback Andrew Luck (12) throws as he is tackled by Tennessee Titans defensive end Jurrell Casey in the first half of an NFL football game in Indianapolis, Sunday, Sept. 28, 2014. (AP Photo/Michael Conroy)

Tennessee Titans defensive end Jurrell Casey, left, chases Indianapolis Colts quarterback Andrew Luck during the first half of an NFL football game in Indianapolis, Sunday, Sept. 28, 2014. (AP Photo/Darron Cummings)

Indianapolis Colts running back Trent Richardson celebrates his touchdown against the Tennessee Titans during the first half of an NFL football game in Indianapolis, Sunday, Sept. 28, 2014. (AP Photo/Darron Cummings)

Indianapolis Colts running back Trent Richardson, left, and running back Dan Herron celebrate Richardson's touchdown against the Tennessee Titans during the first half of an NFL football game in Indianapolis, Sunday, Sept. 28, 2014. (AP Photo/Darron Cummings)

Indianapolis Colts running back Trent Richardson (34) scores a touchdown in front of Tennessee Titans strong safety Bernard Pollard (31) during the first half of an NFL football game in Indianapolis, Sunday, Sept. 28, 2014. (AP Photo/AJ Mast)

Tennessee Titans quarterback Charlie Whitehurst throws against the Indianapolis Colts during the first half of an NFL football game in Indianapolis, Sunday, Sept. 28, 2014. (AP Photo/Darron Cummings)

Indianapolis Colts tight end Dwayne Allen makes a catch for a touchdown as he's hit by Tennessee Titans inside linebacker Wesley Woodyard during the first half of an NFL football game in Indianapolis, Sunday, Sept. 28, 2014. (AP Photo/AJ Mast)

Indianapolis Colts tight end Dwayne Allen (83) celebrates his touchdown in front of teammate T.Y. Hilton during the first half of an NFL football game against the Tennessee Titans in Indianapolis, Sunday, Sept. 28, 2014. (AP Photo/AJ Mast)

Tennessee Titans defensive tackle Mike Martin chase Indianapolis Colts quarterback Andrew Luck during the first half of an NFL football game in Indianapolis, Sunday, Sept. 28, 2014. (AP Photo/AJ Mast)

nIndianapolis Colts strong safety Mike Adams, left, avoids the tackle of Tennessee Titans running back Leon Washington after making an interception during the first half of an NFL football game in Indianapolis, Sunday, Sept. 28, 2014. (AP Photo/Darron Cummings)

Tennessee Titans kicker Ryan Succop celebrates a field goal against the Indianapolis Colts during the first half of an NFL football game in Indianapolis, Sunday, Sept. 28, 2014. (AP Photo/AJ Mast)

Indianapolis Colts tight end Coby Fleener (80) scores a touchdown against the Tennessee Titans during the second half of an NFL football game in Indianapolis, Sunday, Sept. 28, 2014. (AP Photo/AJ Mast)

Tennessee Titans quarterback Charlie Whitehurst, center, is pressured by Indianapolis Colts outside linebackers Josh McNary, left, and Bjoern Werner during the second half of an NFL football game in Indianapolis, Sunday, Sept. 28, 2014. (AP Photo/Darron Cummings)