The Mariners returned Bernardino to Triple-A Tacoma on Sunday.
Bernardino's stay with Seattle lasted just one day, as the Mariners designated him as their 27th man for Saturday's doubleheader with the Angels. The lefty reliever appeared out of the bullpen in the Mariners' 7-1 loss in Game 1, covering two innings while allowing two runs (one earned) on two hits and a walk.