The Athletics optioned Serven to Triple-A Las Vegas on Tuesday.
The 31-year-old was called up by the A's on Saturday with Shea Langeliers (thumb) banged up, but the latter is apparently feeling well enough for the big club to move forward with two catchers on the roster. Serven went 1-for-4 with a strikeout in his lone appearance in the majors. He'll now return to Las Vegas, where he has an .897 OPS with seven homers in 53 games this year.