JC Tretter retiring from the NFL after nine-year career

Veteran offensive lineman and president of the NFL players association JC Tretter announced Thursday his retirement from the league on Twitter.

In the announcement, Tretter referenced a letter he wrote to himself in May 2011, when he was a tight end at Cornell.

“I am proud of what I’ve accomplished and how far I’ve come from that night when I made the pledge to myself,” Tretter wrote. “I feel like if my 31 year-old self could talk to my 20 year-old self, I could earnestly tell him that we did it. We did everything we said we’d do and more.”

Tretter changed his position to offensive line and would ultimately get drafted by the Packers in the fourth round of the 2013 draft. He spent four seasons in Green Bay, then signed in Cleveland where he played the next five years.