The Padres placed Estrada on the 15-day injured list Wednesday due to a right shoulder impingement.
Analysis:Estrada will head to the IL for the third time this season after previously missing action due to elbow and knee issues. When healthy, he's logged a 3.48 ERA and 38:16 K:BB over 31 frames this season. It's unclear how long Estrada's absence will last.
