Adrian Robinson, a former Temple defensive lineman who recently signed with the Canadian Football League's Hamilton Tiger-Cats, has died. He was 25.

Adrian Robinson played in 20 NFL games, including 12 for the Steelers in 2012. AP Photo/Gene J. Puskar

The Tiger-Cats and Robinson's representatives announced the death Sunday.

The Philadelphia Medical Examiner's office ruled on Monday that Robinson's death was a suicide, according to The Denver Post.

Robinson signed with Hamilton as a free agent April 27. He appeared in 12 games for the Pittsburgh Steelers in 2012. In 2013, he played six games for the Denver Broncos and two for the San Diego Chargers.

On Monday, Steelers coach Mike Tomlin tweeted out his condolences to Robinson's family.

My thoughts are with the family of Adrian Robinson during this difficult time. Very sad that he passed away at such a young age. — Mike Tomlin (@CoachTomlin) May 18, 2015

From Harrisburg, Pennsylvania, Robinson had 156 tackles and 22.5 sacks in 50 games for Temple.

In 2009, in his sophomore season, he was honored as the Mid-American Conference defensive player of the year. He had 14 tackles for losses and 12 sacks that season.