The Cleveland Browns have announced that franchise star Joe Thomas is retiring, after 11 phenomenal seasons in the NFL:

Thomas was drafted third-overall by the Browns in 2007, and he was easily worth the investment. He was named to the Pro Bowl in each of his first 10 seasons, and was also a seven-time First-team All-Pro selection.

On top of that, Thomas defined the term "iron man." He didn't miss a single game until Week 7 of the 2017 season, suffering a torn triceps injury that ended his season. As such, Thomas had a streak of playing in 10,363 consecutive snaps.

Thomas became one of the NFL's most popular players for many reasons, especially due to his incredible sportsmanship and humbleness, despite playing on a Browns team that never took him to the playoffs. Thomas stayed loyal to the franchise throughout his career, and is a sure lock for the Hall of Fame.

During the 2017 offseason, Thomas told ESPN that he was suffering short-term memory loss, but understood it was a risk in playing football. It's safe to assume that is why he opted to retire, because Thomas was still playing at an elite form in 2017.

The Browns were rumored to be after former New England Patriots left tackle Nate Solder in free agency, as he would have been the perfect replacement for Thomas.

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However, Solder inked a massive four-year contract with the New York Giants worth $62 million. The Browns own the first and fourth picks in the draft, so there is a chance they opt to find Thomas' replacement there - or in a later round.

The Browns are going to look a whole lot different next season. They've acquired quarterback Tyrod Taylor and star wideout Jarvis Landry in separate trades. On top of that, they signed offensive lineman Chris Hubbard to a five-year deal and are expected to land running back Carlos Hyde.

Though Thomas' retirement does sting, the Browns at least are looking much better on paper.

NEXT: HUGE MISTAKES THAT DOOMED THE CLEVELAND BROWNS