Haggerty went 3-for-5 with a homer, a steal, a pair of RBI and a pair of runs scored Saturday against Boston.
Haggerty scored on Kyle Seager's two-run triple in the second inning. He later extended the Mariners' lead to five with a solo shot off Josh Taylor in the eighth inning, his second homer of the year. He now sits second on the team with three steals.