The Blue Jays have signed Mark DeRosa, presumably to be the right handed bat off the bench that AA was looking for. To make room on the 40 man roster Sam Dyson was designated for assignment. DeRosa is 37 years old, 38 by opening day, and hasn't had a 100 OPS+ season since 2009. However I assume he will rarely see a right handed pitcher and DeRosa has hit better against lefties.
Dyson was selected for assignment over someone like Ryan Goins or Jeremy Jeffress. It is likely that some team will pick up Dyson. This assumed loss makes it even more puzzling as to why Dyson was called up for 2 games last season. That might cost them the player. However Dyson is a confirmed reliever and they are a dime a dozen these days, unless your K rate is 12 in AA. Dyson was far from that.
So are we done with the roster now?