Up until the past week, spring training had been very smooth sailing for the Diamondbacks. The back of the bullpen and the end of the bench were sorting themselves out slowly, and the competition for the fifth starter’s job was proceeding as planned. But over the past few days, the team has lost relievers Mark Melancon and Corbin Martin, plus yesterday catcher Carson Kelly, to significant injuries. So, let’s review how these situations now shake up the likely Opening Day roster, as we head into the final stretch of the pre-season. Below is my best guess, with changes since we last looked.