The Athletics recalled Alvarez from Triple-A Las Vegas on Wednesday.
Oakland optioned Alvarez to Triple-A on Saturday, but he'll be eligible to rejoin the big club four days later since the Athletics placed Brent Rooker (personal) on the paternity list in a corresponding move. Rooker is expected to miss between one and three games while he's on the paternity list, and once he returns, Alvarez will likely head back to the minors.