Arrieta revealed the existence of the bone spur after a July 6 start in New York in which he gave up six runs and 11 hits in 4 ⅔ innings against the Mets. It has affected his ability to command certain pitches or go deep into games. He hasn’t completed the sixth inning in a start since June 30, although it’s notable that he carried a 3.28 earned-run average in his last five starts into Sunday night.