SAN DIEGO — The Mariners swapped out bullpen pieces on Tuesday afternoon, bringing up their best performing reliever in Class AAA Tacoma to help out their bullpen.
Right-hander Shawn Armstrong had his minor league contract selected and was added to the active roster. To make room for Armstrong, right-hander Nick Rumbelow was optioned to Class AA Arkansas.
Armstrong, who turns 28 on Sept. 11, has been solid all season for the Rainiers. He’s 15-for-17 in save opportunities with a 2-5 recored and a 1.77 ERA (11 ER, 56.0 IP) in 49 relief appearances. He’s struck out 82 batters with just 26 walks.