WEST SACRAMENTO -- An opening in the starting rotation is going to allow the Athletics to get a look at one of their promising young arms.

With Jacob Lopez officially landing on the 15-day injured list , the A’s called up right-hander Mason Barnett from Triple-A Las Vegas ahead of Tuesday night’s game against the Tigers at Sutter Health Park. Rated the club’s No. 11 prospect by MLB Pipeline, Barnett was available out of the bullpen as a long reliever.

“For Mason, it’s a big day for him,” manager Mark Kotsay said. “It’s exciting. … He’s made every start this year. That says something about the durability.”

Listed at 6-foot and 218 pounds, Barnett has indeed proven to be a sturdy presence on the mound. Acquired at the 2024 Trade Deadline from the Royals as part of the return for r

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