​As the ​Dallas Cowboys continue to make changes following a fairly ​successful season in which they made it to the NFC Divisional Round, it appears that the chances of defensive lineman David Irving returning to the team are slim at best.

While talented, Irving has struggled to stay on the field consistently during his time in Dallas thanks to PED issues. He's unlikely to return to the Cowboys in 2019, according to Cowboys inisder Jon Machota of the Dallas Morning News.

In his four seasons with the Cowboys, Irving has shown flashes of brilliance. He racked up seven sacks in just eight games in 2017, but he missed four games to start the year to serve a suspension for violating the league's PED policy.

He again was suspended for four games at the start of the 2018 season, this time for a violation of the league's substance abuse policy.

It was no skin off of the defense's nose, though. The Cowboys finished with the sixth-best defense in the NFL despite Irving playing in just two games.

It's an unfortunate end to another one of Jerry Jones' rehabilitation projects. Irving will probably find another team willing to take a chance on him, but it's unlikely that anyone will be as patient with him as the Cowb