Yes, Ayala was one of our most effective relief pitchers in 2005, got injured in the 2006 WBC, and was never the same.
It was worse. He had offseason surgery to remove a bone spur on his throwing elbow, and was rehabbing when the WBC came around. He wanted to pitch for Mexico, the Nats objected, league overruled the Nats and allowed him to pitch. Didn't take too many before he blew out his UCL.
