WWE's Daniel Bryan Announces Retirement, Will Appear on Raw Tonight [UPDATE]

[UPDATE] Daniel Bryan closed tonight's episode of Raw by addressing his retirement, expressing gratitude towards his fans, and joining them for one last "Yes!" chant.

The original story follows.

Former WWE World Heavyweight Champion Daniel Bryan has announced his retirement via Twitter. The wrestler says he will be on tonight's episode of Raw to elaborate on why his career has come to an end.

Bryan's career was at an all-time high when he lost the strength in his right arm in May 2014. After winning both the WWE and World Heavyweight Championships at WrestleMania 30, he had to forfeit the titles to undergo neck surgery. He would return to WWE the next year to win the Intercontinental title, but it wouldn't be long before an unknown injury required him to relinquish his title a second time.

The injury was eventually disclosed as concussion-related. Though Bryan was cleared by doctors at UCLA, the WWE was hesitant to do so themselves. Bryan's career was known to be at risk and that a return to professional wrestling was very unlikely.

Aside from medical reasons, not much is known about what exactly has pushed Bryan to retire. We will update this story as more information becomes available.