Mariners 5, Twins 4
Trayvon Robinson's two-run single capped a four-run sixth inning and visiting Seattle took three of four games from Minnesota.
Blake Beavan (9-8) overcame a rocky first inning to allow two runs on five hits in seven innings and beat the Twins for the second time in 12 days.
Closer Tom Wilhelmsen worked around a pair of walks in the ninth to earn his 21st save.
Kyle Seager had a pair of RBIs to lift the Mariners to their 11th win in 15 games and eighth in the last nine meetings with Minnesota.
Twins left-hander Brian Duensing (3-10) lost for the fourth time in five starts, giving up four runs - three earned - on four hits in 5 1/3 innings.
Josh Willingham belted a two-run homer off Stephen Pryor in the eighth, his 33rd, but he also committed a costly error during the decisive sixth inning as Minnesota fell to 4-17 in its last 21 games.
Seager's sacrifice fly tied it at 2-2 in the sixth before Willingham dropped a routine fly ball in left field, allowing Dustin Ackley to score the go-ahead run before Robinson delivered a two-run single for a 5-2 lead.
GAME NOTEBOOK: Seager has accounted for 55 of his 77 RBIs away from home. ... Willingham hit his sixth homer in 26 games against Seattle. He is within three RBIs of his career-high total of 98 set last year. ... After sitting out one game, Mariners CF Franklin Gutierrez went 2-for-4 in his return to the lineup. ... Duensing has lost double-digit games for the second straight season. He was 9-14 a year ago. ... The Mariners will open a 10-game homestand with a three-game set against the Los Angeles Angels while the Twins head to Kansas City to play three games.