SEATTLE -- As they prepare for a tough 10-game stretch against the best teams in the American League East, the Mariners moved to beef up their bullpen on Thursday by promoting right-handers Nick Rumbelow and Rob Whalen from Triple-A Tacoma.
First baseman Daniel Vogelbach was optioned back to Tacoma and right-handed reliever Mike Morin was designated for assignment to open spots on the Major League roster. Both Rumbelow and Whalen will be available for Thursday's series opener against Boston at Safeco Field as Seattle embarks on a stretch where it plays two series against the Red Sox and one against the Yankees.