Former NFL linebacker Adrian Robinson, who played for the Pittsburgh Steelers, Denver Broncos and the Washington Redskins, hanged himself to death on Saturday. He was 25.

Yahoo Sports reports details on Robinson's death were not available immediately, but noted that the casualty was an undrafted free agent who joined the Pittsburgh Steelers back in 2012.

A similar Washington Post report noted that he has just signed with the CFL's Hamilton Tiger-Cats in April after playing for the NFL for about three years.

While he was playing for Temple University, Robinson reportedly won numerous Mid-American Conference honors like the league's Defensive Player of the Year Award in 2009.

"He played in every game of his college career, making 38 starts, and he accumulated (per Sports Reference) 156 total tackles and 22.5 sacks," added Washington Post.

After playing for 12 games with the Steelers, Robinson joined the Eagles but was later on cut by the team during training camp.

The following year, he played for the Broncos, Chargers and Redskins. He was kicked out in 2014 by the Redskins then he participated in the Buccaneers' practice team before he decided to sign with the CFL.

Message of grief and condolences poured on social media after people learned about the death of Robinson.

On his Twitter account, Steelers head coach Mike Tomlin said, "My thoughts are with the family of Adrian Robinson during this difficult time. Very sad that he passed away at such a young age."

Temple Coach Matt Rhule said in a statement that he considered the linebacker "a friend, a brother, and a wonderful young man."

"Adrian Robinson was one of the greatest competitors I ever had the pleasure of coaching and I know he was an even better teammate. I first met Adrian as an 18-year-old high school senior. I was so proud to see him back at Temple this spring, finishing his degree and being a loving father to his new daughter," Rhule added in his statement.

He went on to say that the player will remain part of their program even if he has already bid goodbye to this world.

"Our hearts and thoughts go out to the Robinson family - his parents Terry and Adrian Sr., brother Averee and sister Aija, and his daughter Avery Marie," the Temple coach finally said.

On its Facebook page, Robinson's agency, Symmetry, said that they are saddened by the football player's passing.

"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," the agency wrote.

The agency is currently asking for donations for Robinson's daughter through this campaign page.