The commissioner’s office announced 50-game suspensions for Mets farmhand Junior Guerra, a righthander Junior Guerra, and Red Sox farmhand Cristopher De La Rosa, an outfielder, for testing positive for performance-enhancing drugs.

Guerra, who received the news on his 24th birthday, is a converted catcher who finished the season with a solid effort in Hawaii Winter Baseball. He reached high Class A in last year’s regular season, striking out 41 in 34 innings through four stops, before showing a mid-90s fastball in Hawaii. He tested positive for a metabolite of nandrolone.

De La Rosa, 19, hit just .219/.378/.343 in the Rookie-level Dominican Summer League. He tested positive for metabolites of stanozolol.