Adrian Robinson, who never missed a game during four seasons playing linebacker at Temple, died Saturday. He was 25.

Robinson leaves behind a young daughter. The cause of his death is currently unknown.

His agency, Symmetry, confirmed the news Sunday morning:

It deeply saddens all of us to share with you that Adrian Robinson Jr. passed away last night at the age of 25. Adrian was a beloved father, son, brother, friend and teammate. We ask that you please respect his family’s privacy during this difficult time, and especially keep his daughter Avery Marie in your prayers. Thank you for all of your support and consideration.

Robinson's friends and former teammates also took to social media to say their goodbyes:

Rest in Paradise A-Rob ?? — Jaiquawn Jarrett (@jaiquawnjarrett) May 17, 2015

Prayers go up to that man, his family and his little girl... No names needed. Love you always bro. — Bernard Pierce (@BPierce_30) May 17, 2015

Crazy!! RIP Adrian Robinson. Trained w him 4 our prodays @PowerTrainSI & was goin to being playing beside him in the black & gold this year. — Erik Harris (@e_harris_31) May 17, 2015

The TU Football Family lost a brother last night.. Adrian Robinson was a good kid and a hell of a football player..only 25 smh..RIP brother — Steve Maneri (@stevemaneri) May 17, 2015

RIP Adrian Robinson..Hburg's finest..A real #TempleMade dude who repped @Temple_FB so well..He ALWAYS had a smile on his face..I am stunned — Travis Manger (@TravisManger) May 17, 2015

Robinson finished his collegiate career with 156 tackles, 22.5 sacks and eight forced fumbles.

A native of Harrisburg, Pa., Robinson signed with the Pittsburgh Steelers in 2012 as an undrafted free agent and went on to appear in 12 games for the team, primarily on special teams. His last NFL season came in 2013, which he split between the Denver Broncos, San Diego Chargers and Washington Redskins.

Robinson had recently been taking classes to finish his degree and was looking to continue his career in the CFL after signing with the Hamilton Tiger-Cats in April, according to OwlScoop.com.