Indianapolis Colts' Marlon Mack (25) runs against Dallas Cowboys' Leighton Vander Esch (55) during the second half of an NFL football game, Sunday, Dec. 16, 2018, in Indianapolis. (AP Photo/Michael Conroy)

Dallas Cowboys running back Ezekiel Elliott (21) is chased by Indianapolis Colts outside linebacker Darius Leonard (53) during the first half of an NFL football game, Sunday, Dec. 16, 2018, in Indianapolis. (AP Photo/Michael Conroy)

Dallas Cowboys quarterback Dak Prescott throws before an NFL football game between the Indianapolis Colts and the Dallas Cowboys, Sunday, Dec. 16, 2018, in Indianapolis. (AP Photo/Michael Conroy)

Indianapolis Colts quarterback Andrew Luck throws before an NFL football game between the Indianapolis Colts and the Dallas Cowboys, Sunday, Dec. 16, 2018, in Indianapolis. (AP Photo/AJ Mast)

The cleats of Indianapolis Colts outside linebacker Darius Leonard are seen before an NFL football game between the Indianapolis Colts and the Dallas Cowboys, Sunday, Dec. 16, 2018, in Indianapolis. (AP Photo/AJ Mast)

Dallas Cowboys head coach Jason Garrett watches the first half of an NFL football game against the Indianapolis Colts, Sunday, Dec. 16, 2018, in Indianapolis. (AP Photo/Michael Conroy)

Dallas Cowboys strong safety Jeff Heath (38) moves to tackle Indianapolis Colts running back Marlon Mack (25) during the first half of an NFL football game Sunday, Dec. 16, 2018, in Indianapolis. (AP Photo/Michael Conroy)

Dallas Cowboys running back Rod Smith (45) is tackled by Indianapolis Colts outside linebacker Darius Leonard (53) during the first half of an NFL football game, Sunday, Dec. 16, 2018, in Indianapolis. (AP Photo/Michael Conroy)

Indianapolis Colts running back Marlon Mack (25) scores a touchdown while being tackled by Dallas Cowboys strong safety Jeff Heath (38) during the first half of an NFL football game, Sunday, Dec. 16, 2018, in Indianapolis. (AP Photo/Darron Cummings)

Dallas Cowboys quarterback Dak Prescott throws during the first half of an NFL football game against the Indianapolis Colts, Sunday, Dec. 16, 2018, in Indianapolis. (AP Photo/Darron Cummings)

Dallas Cowboys running back Ezekiel Elliott (21) runs with the ballduring the first half of an NFL football game against the Indianapolis Colts, Sunday, Dec. 16, 2018, in Indianapolis. (AP Photo/AJ Mast)

Indianapolis Colts' Marlon Mack (25) is tackled by Dallas Cowboys' Leighton Vander Esch (55) as he jumps over Xavier Woods (25) during the first half of an NFL football game, Sunday, Dec. 16, 2018, in Indianapolis. (AP Photo/Michael Conroy)

Indianapolis Colts quarterback Andrew Luck (12) prepares to throw during the first half of an NFL football game against the Dallas Cowboys, Sunday, Dec. 16, 2018, in Indianapolis. (AP Photo/AJ Mast)

Dallas Cowboys wide receiver Amari Cooper (19) is tackled by Indianapolis Colts' Anthony Walker (50) and Clayton Geathers (26) during the first half of an NFL football game, Sunday, Dec. 16, 2018, in Indianapolis. (AP Photo/Michael Conroy)

Indianapolis Colts quarterback Andrew Luck (12) looks to throw during the first half of an NFL football game against the Dallas Cowboys, Sunday, Dec. 16, 2018, in Indianapolis. (AP Photo/AJ Mast)

Indianapolis Colts head coach Frank Reich watches the first half of an NFL football game against the Dallas Cowboys, Sunday, Dec. 16, 2018, in Indianapolis. (AP Photo/AJ Mast)

Indianapolis Colts' Adam Vinatieri (4) is congratulated by teammate Grover Stewart after kicking a field goal during the second half of an NFL football game against the Dallas Cowboys, Sunday, Dec. 16, 2018, in Indianapolis. (AP Photo/Michael Conroy)

Indianapolis Colts kicker Adam Vinatieri (4) boots a field goal out of the hold of Rigoberto Sanchez during the second half of an NFL football game against the Dallas Cowboys, Sunday, Dec. 16, 2018, in Indianapolis. (AP Photo/Michael Conroy)

Dallas Cowboys' Ezekiel Elliott (21) is tackled by Indianapolis Colts' Clayton Geathers (26) during the second half of an NFL football game, Sunday, Dec. 16, 2018, in Indianapolis. (AP Photo/Michael Conroy)

Dallas Cowboys head coach Jason Garrett talks with Indianapolis Colts head coach Frank Reich, right, following an NFL football game, Sunday, Dec. 16, 2018, in Indianapolis. (AP Photo/AJ Mast)

Dallas Cowboys running back Ezekiel Elliott leaps over Indianapolis Colts cornerback Pierre Desir during the first half of an NFL football game, Sunday, Dec. 16, 2018, in Indianapolis. Indianapolis won 23-0. (AP Photo/AJ Mast)

Indianapolis Colts quarterback Andrew Luck reacts as he leaves the field following an NFL football game against the Dallas Cowboys, Sunday, Dec. 16, 2018, in Indianapolis. (AP Photo/Michael Conroy)

Colts defensive tackle Denico Autry reacts after stopping the Cowboys offense in the first half of Indianapolis' 23-0 shutout of Dallas at Lucas Oil Stadium.

Colts tight end Eric Ebron (85) breaks a tackle by the Cowboys' Chidobe Awuzie (24) in the first half of Indianapolis' win.