Matt Cappotelli, the winner of WWE’s reality show “Tough Enough,” died Friday after fighting two battles with brain cancer, WDRB reports. He was 38.

Cappotelli was first diagnosed with a brain tumor in 2005, beating it two years later. However, in 2017, doctors diagnosed him with a Grade 4 glioblastoma tumor and were subsequently unable to fully remove it, deeming it terminal, WDRB reports.

Cappotelli, who is survived by his wife, became a trainer at Ohio Valley Wrestling after his retirement.

TheWrap has reached out to the WWE for comment on Cappotelli’s death.

Fellow wrestlers and wrestling fans mourned his passing on social media.

My first best friend in the wrestling business and to this day one of the best people I’ve ever known Matt Cappotelli has passed on. I’m gutted about this news. Matt inspired everyone around him especially me early in my career. He is loved and will be missed. — John Morrison (@TheRealMorrison) June 29, 2018

Sad end for Matt Cappotelli. The dude fought SO HARD. Glad his suffering is over. Condolences to his family and friends.#RIP — Greg Morgan (@GoodMicWork) June 29, 2018

Rest In Peace my friend & coach, most importantly a man of Faith #MattCappotelli I am so sad but know you are shining down & with our heavenly Father pic.twitter.com/Ebtbh8UaYL — REBEL/ Tanea (@RebelTanea) June 29, 2018

I'm heart broken with the news of the passing of Matt Cappotelli. He is an inspiring young man that touched so many with his smile, his heart, and his faith. My love and prayers go out to Matts wife Lindsay and the family. #TeamCapp #RIPMAtt pic.twitter.com/GpZlWSfZiJ — Bill DeMott (@BillDeMott) June 29, 2018