The Mets announced that they have designated left-hander Garrett Olson for assignment. The move will allow the Mets to re-activate Johan Santana from the disabled list.
Olson, 28, saw just one-third of an inning with the Mets this year when he pitched against the Marlins in a blowout loss on Wednesday. In 104 career big league appearances, Olson has a 6.26 ERA with 6.0 K/9 and 4.5 BB/9.