Seattle manager Lloyd McClendon announced the decision on Saturday, but did not indicate what the corresponding roster move will be. Beavan, currently at Triple-A Tacoma, is expected to meet the club in Texas on Monday.
Beavan is 1-0 with a 2.08 ERA in two starts for Tacoma. Seattle needed an extra starter after James Paxton went on the disabled list earlier this week.
There was a question if Taijuan Walker, who was slowed during spring training with a sore shoulder, would be ready to join the rotation after throwing at Double-A Jackson earlier this week.
McClendon said the team wants to remain cautious with Walker, and he'll report to Tacoma and make his next start there.
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