Guy is actually 25 and his name is not Jairo Garcia.
From the Chron:
Jairo Garcia, the A's top minor-league reliever, is now known as Santiago Casilla. That is his real name; Casilla used false documents when he signed his first contract, something that is not unusual in the Dominican Republic but that has been less frequent since a post-Sept. 11 crackdown on visas.
"It's something we didn't know about, but he came forward with the information, so I commend him for that,'' general manager Billy Beane said.
Garcia/Casilla has aged 2 years and 10 months; he's now 25. He'll have to be issued all new papers, which could delay his arrival at spring training.
It's going to take the A's some getting used to. Beane referred to Casilla as "Jairo'' several times.
"I'm sure we'll all just keep calling him Jairo,'' Haren said. "That's such a good name, too.''