Updating a previous report, Miley has been diagnosed with a muscle strain in his upper back, Roch Kubatko of MASN Sports reports.
Miley left Sunday's game with what was originally referred to as cramps, but it now sounds as if the ailment is slightly more serious, as he has been officially diagnosed with a muscle strain. This may put the left-hander's next start in jeopardy, so his status is worth checking up on later this week.