TAMPA, FL - JANUARY 09: Offensive lineman Jay Guillermo #57 of the Clemson Tigers waits to snap the ball during the first half against the Alabama Crimson Tide in the 2017 College Football Playoff National Championship Game at Raymond James Stadium on January 9, 2017 in Tampa, Florida. (Photo by Kevin C. Cox/Getty Images)

National champion college football player set to retire at just 22

This was abrupt.

After winning a national title, it looks like former Clemson center Jay Guillermo is calling it a career.

Guillermo announced the decision on his Twitter account on Wednesday morning.

From Guillermo's statement:

There comes a time in every athlete's career where they have to make one of the most difficult and painful decisions they will every have to make. My decision to retire from football is exactly that. I came to this decision far sooner than I ever imagined I would have to, but I am thoroughly confident in my choice. I have loved football my entire life and it pains me to say goodbye and walk away from the sport that has give me and my family so much over the years.

Guillermo made the decision after going undrafted in the 2017 NFL Draft. He was signed by the Buffalo Bills and then the CFL's Toronto Argonauts before making the decision.

Guillermo started 29 games in his career with Clemson, and was twice named to the All-ACC team. Guillermo was a big part of Clemson two national title games against Alabama, and he played 99 offensive snaps in Clemson's eventual title win in 2016.