Gray (1-1) surrendered three earned runs on six hits and three walks over 6.1 innings in Monday's loss to the Angels, striking out six.
Gray got away with control problems in his season debut against the White Sox, but he continues to live dangerously with seven free passes given out through two starts. He issued less than two walks per start last season in Oakland's strike-throwing system, so there'll be cause for concern if Gray can't correct this issue in his next start Sunday against a Royals team that doesn't walk much.