ANAHEIM — The A’s bolstered their bullpen depth Thursday just ahead of an important four-game series with the first-place Angels, recalling right-handed reliever Evan Scribner from Triple-A Sacramento.

To make room on the roster for Scribner, the A’s sent Wednesday night’s starter in Houston, Drew Pomeranz, to Class-A Beloit, Wisconsin, the same destination to which the A’s sent first baseman Nate Freiman Wednesday.

By sending Pomeranz and Freiman to Beloit, which will not make the Midwest League playoffs, the A’s can bring both back on Tuesday. Sending them to Triple-A Sacramento, which is headed to the Pacific Coast League playoffs, would mean both men would have to stay down for 10 days.

This is the fourth promotion to the big leagues for Scribner, who joins a bullpen that has been one man short since closer Sean Doolittle went on the disabled list Sunday.

Scribner, who began the season on the A’s opening day roster, is 4-1 with a 3.06 ERA at Sacramento with 16 saves for the River Cats. With Oakland he is 1-0 with a 1.69 ERA in six relief appearances.

For more on the A’s, see John Hickey’s Inside the A’s blog at ibabuzz.com/athletics.