The Diamondbacks have four players on the 40-man who can play catcher. Despite injuries, because of last season’s hitting breakout Carson Kelly is a lock for the primary catcher position.
Although he may not be added to their [40-man] roster [he was!], Cooper Hummel is at risk because:
In 2021, his .432 OBP ranked 7th in minors, and his .978 OPS ranked 10th in minors per this article. Also, he hit for the cycle in AAA.
His position versatility is valued by the Diamondbacks.