WWE's Daniel Bryan announces retirement

Pro wrestler Daniel Bryan announced he will be retiring from the WWE Monday.

On Twitter, Bryan wrote, "Due to medical reasons, effective immediately, I am announcing my retirement."

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.