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Right-handers Raul Alcantara and Michael Ynoa, the Oakland A’s top two pitching prospects, were optioned to the minors Monday along with first baseman Shane Peterson.

Alcantara, the team’s No. 3 overall prospect according to Baseball America, was sent to Double-A Midland. The 21-year-old appeared in two games and allowed three hits and one unearned run over four innings, with two strikeouts and one walk.

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Ynoa, 22, the A’s No. 4 prospect, was optioned to Single-A Stockton, where he finished last season. He also pitched in two games and surrendered three earned runs and five hits in three innings, walking three and striking out three.

Peterson appeared in two games last season for the A’s in his major league debut. He hit .167 this spring with one RBI in 10 games and faced crowded competition in the outfield.

The A’s made their first cuts Sunday when they reassigned left-hander Andrew Werner, right-handers Jose Flores and Jeremy McBryde and catchers Dusty Brown and Bruce Maxwell. Oakland now has 47 players left in major league camp.