On January 4, 2017, Cooper was signed by the Dallas Cowboys to provide depth on the offensive line for the playoffs and to evaluate his performance closely, as the Cowboys had been interested in Cooper since the 2013 NFL draft.

On March 14, 2017, Cooper signed a one-year contract with the Dallas Cowboys to compete for the vacant left guard job after Ronald Leary departed in free agency, with La'el Collins additionally moving to right tackle.
He also was tried at center during Organized Team Activities.
He was declared inactive for the first three games.
He was named the starter at left guard in the fourth game against the Los Angeles Rams in place of an injured Chaz Green, helping to stabilize the offensive line the rest of the season.
He started a career-high 13 games, but suffered a sprained left medial collateral ligament in the season finale against the Philadelphia Eagles.
On January 4, 2017, Cooper was signed by the Dallas Cowboys to provide depth on the offensive line for the playoffs and to evaluate his performance closely, as the Cowboys had been interested in Cooper since the 2013 NFL draft.
On March 14, 2017, Cooper signed a one-year contract with the Dallas Cowboys to compete for the vacant left guard job after Ronald Leary departed in free agency, with La'el Collins additionally moving to right tackle. He also was tried at center during Organized Team Activities. He was declared inactive for the first three games. He was named the starter at left guard in the fourth game against the Los Angeles Rams in place of an injured Chaz Green, helping to stabilize the offensive line the rest of the season. He started a career-high 13 games, but suffered a sprained left medial collateral ligament in the season finale against the Philadelphia Eagles.
Jonathan Cooper