A's option Elvis Alvarado to Las Vegas, recall Mason Barnett to Oakland

Mason Barnett’s return to Oakland came with a direct cost to Triple-A Las Vegas, where the Athletics optioned Elvis Alvarado and pulled one of the Aviators’ most effective starters back into the big-league mix. The April 18 roster move, logged by Major League Baseball, fit the pattern the A’s have been using all month in West Sacramento and Nevada: keep cycling pitchers between the majors and Las Vegas as the club tries to stabilize its staff.

Alvarado, 27, had already carved out a real role for himself in Oakland. He made his major-league debut on May 9, 2025, and last season worked 37 relief appearances with a 3.19 ERA and 50 strikeouts in 42.1 innings. He also spent 25 games with the Aviators in 2025, finishing with eight saves and a 3.38 ERA. His recent game logs from April 10, April 15 and April 17 showed that Oakland had been using him in higher-leverage spots before the demotion, so the option sends a proven bullpen piece back to a Triple-A club that will now have to replace those innings and those late-game outs.

Barnett, 25, gives Oakland a different kind of arm. The right-hander came to the A’s from the Kansas City Royals at the 2024 trade deadline as the headliner in the Lucas Erceg deal, and his path through the system has already included a big-league cameo. MLB.com previously reported that Barnett was called up in 2025 when Jacob Lopez went on the injured list, with Barnett available as a long reliever. This time, he earned the promotion on the strength of his work in Las Vegas.

At the time of the move, Barnett was 2-0 with a 3.07 ERA, 14 strikeouts and 14.2 innings across three Triple-A starts for the Aviators in 2026. The A’s had him back in the major-league picture for a reason: they have already shown they view him as more than a prospect stash, and the latest shuffle again underlined how thin the line is between Oakland’s active roster and the Las Vegas rotation. For the Aviators, losing Barnett removes a starter who had been giving them quality innings; for Oakland, it opens the door to another arm it trusts enough to use right now.