Former SMU linebacker Blake Carlisle died on Wednesday, a source confirmed. The team found out about Carlisle's passing after practice Wednesday evening. The cause of death is unknown at this time.

Carlisle signed a letter of intent to play at SMU out of Dickinson High School in 2016. He enrolled at SMU for his redshirt freshman season but was not on the 2017 roster or enrolled in classes this semester.

Carlisle's former teammates took to Twitter to express their sorrow at his passing.

"I remember sitting in class just quoting movie lines laughing [with you]. Bro lit up any room he was in," wrote SMU offensive lineman Kadarius Smith, a member of Carlisle's signing class. "Blessed I got to meet you."

"Forever in our hearts! We got you Blake," added defensive end Demerick Gary.

Forever in our hearts ! We got you Blake #LL13 ❤✊🏾🐎 pic.twitter.com/ss3PFweH4d — Demerick Gary 🌹 (@demerick_) September 21, 2017

I remember sitting in class just quoting movie lines laughing wit ya. Bro lit up any room he was in. Blessed I got to meet you @TheD1Athlete — KD* (@Kaydee_66) September 21, 2017

I probably didn't say it much but I love you family, You'll always be apart of #StangGang16 🙏🏾🐎 RestEasy brother ❤️ pic.twitter.com/3iF3JwnAs5 — CozyCutsMj (@MDC2_) September 21, 2017

RIP Blake, #StangGang16 for life. Love you brother. — Mikial Onu (@mikial__) September 21, 2017

Rest In Peace to one of my closest friends and forever my brother #StangGang16 for life #LongLiveBlake — E.Sutton🎒 (@Pick6EazyE) September 20, 2017

BRO REST EASY MAN.. RIP MUCH LOVE TO YOU WE GONE BALL @TheD1Athlete — Badejo 🙋🏾‍♂️ (@TheRealBadejo) September 20, 2017

This story will be updated as more information becomes available.