Chris Smith -- a former NFL defensive end who was playing in the XFL this season -- has passed away, according to his agent. He was only 31.

NFL agent Drew Rosenhaus confirmed the devastating news via Twitter on Tuesday, sending condolences to his family, friends, and loved ones.

"Rest in Peace Chris," Rosenhaus tweeted. "We will miss you."

Details surrounding his passing are unknown at this time.

Several tributes from fans and athletes were shared on social media after the announcement, including Buffalo Bills' Shaq Lawson who tweeted, "Man prayers up for Chris Smith family."

"This one hurts."

Cleveland Browns star David Njoku said the death of Smith is heartbreaking as he was a "hometown hero" and had "such a kind soul."

Smith was a fifth-round pick in the 2014 NFL Draft after spending four seasons with the Arkansas Razorbacks where he was named Second-team All-SEC.

The North Carolina native played for the Jaguars, Bengals, Browns, Panthers, Raiders, Ravens, and Texans during his 8-year NFL career. He had 80 total tackles, 11 sacks, and 4 forced fumbles.

During the 2018-19 season with the Browns, Smith's girlfriend and mother of his daughter, Petara Cordero, was tragically killed after she was struck by a passing car after getting out of Chris's car.

Smith was starting a new career in the XFL and just signed with the Seattle Sea Dragons on March 9.

R.I.P.