SEATTLE, July 20 (UPI) -- Bret Boone's grand slam in the bottom of the 11th inning Monday gave Seattle an 8-4 win over the Boston Red Sox.
The Mariners tied the game in the ninth on back-to-back solo homers by Miguel Olivo and Edgar Martinez.
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In the 11th, the Mariners loaded the bases on walks to Olivo and Dave Hansen and Randy Winn before Boone hit the fifth grand slam of his career.
Mike Myers (4-1) got the final out in the 11th for the Mariners to pick up his fourth win of the season against one loss.
Curtis Leskanic (1-5 was the loser.
The win was just the third in 14 games for Seattle. Boston has lost four of six.
