On Twitter, Bryan wrote, "Due to medical reasons, effective immediately, I am announcing my retirement."
Due to medical reasons, effective immediately, I am announcing my retirement. Tonight on Raw, I'll have a chance to elaborate. #gratitude— Daniel Bryan (@WWEDanielBryan) February 8, 2016
Bryan, a former WWE World Heavyweight Champion, is known for his famous Yes! chant that became a popular cheer in the sports world.
Back in September 2012, Bryan, at the time a WWE Tag Team Champion, stopped by 6abc studios where he helped out with a yard sale.