Falcons linebacker Paul Worrilow suffered a groin injury and will miss up to three to four weeks, according to his agent Atlanta-based agent Hadley Engelhard.

The injury has been lingering since the summer for Worrilow, who was the Falcons’ leading tackler over the past three seasons.

As the Falcons tried to upgrade the speed on the defense, Worrilow was replaced in the starting lineup by rookie Deion Jones, a second-round pick from LSU.

Worrilow made the Falcons as an undrafted free agent out of Delaware in 2013.

Worrilow went on to make 95 tackles as a rookie, 143 in 2014 and 127 last season.

He basically helped to train Jones to take over his position while he was moving to a reserve and special teams role.

“I can’t say enough about him,” special teams coordinator Keith Armstrong said. “He embraced his new role. You never saw a change in his effort. You never saw a negative change in his attitude. He was all-in for the team….can’t say enough about him. That, to me, is true leadership”