The Diamondbacks officially announced the signing of reliever Tyler Clippard this morning, and also re-instated right-handed pitcher Luis Frias from the injured list. Frias had tested positive for the COVID-19 virus, and so had not been able to join the team at the start of spring training. But, like fellow coronavirus sufferer Stephen Vogt, it appears Frias is now negative again, and so can come out of quarantine.
These arrivals meant that two spots needed to be freed up on the roster, and it perhaps makes sense that it’s two relievers who have been designated for assignment, to make room.