Yan Gomes hit a three-run homer in the 10th inning and the Cleveland Indians, twice revived by Seattle's fielding errors, beat the Mariners 10-8 on Monday to complete a four-game sweep of the Mariners.
Gomes, who also homered in the second, drove a 3-2 pitch from Charlie Furbush (0-3) over the wall in left, giving the Indians their fifth straight win and third walk-off over the Mariners in four days. As Gomes reached the plate he was mobbed by his teammates following an improbable win that came after Cleveland's bullpen gave up homers in three consecutive innings.
It was the Indians' first four-game sweep of Seattle since 1981, and the comeback gave Cleveland its 18th win in 22 games.
Joe Smith (2-0) won despite giving up a go-ahead homer to Justin Smoak in the 10th.

The Seattle Seahawks have signed tight end Darren Fells and running back Christine Michael to multi-year contracts and released long snapper Adam Steiner, the team announced this morning.
Michael was Seattle's second-round draft choice (62nd overall) in April's NFL Draft and becomes the ninth of Seattle's 11 draft picks to sign. Cornerback Tharold Simon (fifth-round) and tackle Michael Bowie (seventh-round) remain unsigned.
Fells was signed by Seattle on March 6 but released on May 8 and Steiner was claimed off waivers (Oakland) on May 14.

Masterson struck out a season-high 11 in seven shutout innings and Michael Brantley homered and drove in four runs off Felix Hernandez as the Cleveland Indians toppled yet another former Cy Young Award winner on Sunday with a 6-0 win over the Seattle Mariners.
Brantley hit a three-run homer in the second inning off Hernandez (5-3), who failed to go at least six innings for the first time this season.
Staked to an early lead, Masterson (7-2) was dominant for the second straight start. He allowed three singles, easily outdueled Hernandez and ran his consecutive scoreless innings streak to 19. He shut out the New York Yankees 1-0 on four hits in his previous outing.
The Indians improved to 7-1 against Cy Young recipients, knocking off Hernandez, R.A. Dickey, David Price, Roy Halladay, Cliff Lee, Bartolo Colon and Justin Verlander.