Irving opted to retire after the 2018 season but had made it clear a few months back that he was ready to return to the NFL.
He applied for reinstatement to the NFL back in July and had been waiting to hear from the NFL regarding his status.
Irving is a free agent and able to sign with a team immediately.
Irving, 27, originally signed on with the Chiefs as an undrafted free agent out of Iowa State back in 2015. He was waived at the start of the regular season and later added to the Chiefs’ practice squad.
The Cowboys signed him to their active roster just a few weeks into the 2015 season and brought him back on a one-year, $615,000 exclusive rights contract. From there, Dallas used a second-round restricted tender on Irving during, which will cost them $2.914 million for the 2018 season.
In 2018, Irving appeared in two games for the Cowboys and recorded four tackles and a sack.