The A's made the move before opening a four-game series against the Los Angeles Angels on Thursday. Stephen Vogt was called up from Triple-A Sacramento, and Derek Norris moved into the starting lineup in Jaso's place.
Jaso hit his third home run of the season in Oakland's 4-3 victory at Houston on Wednesday. He was replaced by Norris for the eighth inning after taking a ball off his mask and complaining of a headache.
Vogt has hit .154 with a home run and two RBIs in four games with the A's this season.
Oakland also announced that infielder Vinnie Catricala, who was designated for assignment Wednesday, has been outrighted to Double-A Midland.