Back on April 26, the Cleveland Guardians placed reliever Shawn Armstrong on the injured list with a right groin strain. The right-handed pitcher had been one of the Guardians' high-leverage arms, with his injury paving the way for Colin Holderman's return to the major league roster . Since then, Holderman has looked sharp, playing in the eighth inning from time to time, pushing his season ERA down to under a 2.0. As Armstrong begins to trend the right direction, recovering slowly but surely, Cleveland may have found a one-two punch in the setup spot behind closer Cade Smith. Shawn Armstrong's Recovery From Injury Armstrong's groin issue came out of nowhere. During the Guardians' series opener against the Toronto Blue Jays just a few weeks back, he began warming up in the eighth inning, preparing to go into the game in the ninth inning. But when he got back up to stretch out a bit more in between the innings, he felt something was wrong. Eventually, he was placed on the 15-day injured list.…