Tomlin allowed four consecutive RBI hits by Mariners batters in the second inning including a two-run home run to Robinson Cano as Seattle scored five times en route to a 10-4 victory over the Cleveland Indians Progressive Field.
Tomlin (0-4, 9.16 ERA) lost at home for the second time this week, surrendering five earned runs on 10 hits in six innings. It was his third start allowing five earned runs or more. All of Seattle's runs against Tomlin scored with two outs.
Ryon Healy's solo home run was the 10th allowed by Tomlin this season, the most in the major leagues.
Seattle's Marco Gonzales (3-2, 5.02) pitched six innings, allowing a two-run home run to Brandon Guyer in the second while giving up six hits and striking out four Indians batters.
Cleveland mounted a rally in the bottom of the seventh as catcher Yan Gomes was hit by a pitch and Seattle reliever Dan Altavilla issued walks to pinch hitter Jason Kipnis and Francisco Lindor to load the bases for Jose Ramirez.
Facing Mariners lefty James Pazos, Ramirez sent a fly ball to left field that Seattle's Ben Gamel attempted to catch with a dive. Third base umpire Mark Wegner ruled that Gamel made the catch, but a replay challenge overturned the call. Upon review, Ramirez was placed at second and Lindor returned to third with two runs scoring.
Ramirez finished with three hits including a pair of doubles and two RBIs. Gomes added a double and Michael Brantley extended his hitting streak to five games with a first-inning single.
Seattle put the game away in the eighth against Tribe reliever Nick Goody. Mitch Haniger tripled and came home on an RBI single to right by Gamel before Healy deposited his second home run of the game into the left field bleachers, giving the Mariners a five-run advantage.
Haniger's solo home run in the ninth was Seattle's 10th home run in the final three games of the series. The Indians tied a franchise record giving up four home runs in back-to-back games for the first time since 2009.
What it means
Seattle takes the season series 5-2 against the Indians. Cleveland won four of six games between the teams last year and holds a 225-182 edge all-time. It marks the Tribe's first home series loss of 2018.
Tomlin threw 96 pitches, 62 (64 percent) for strikes. Gonzales threw 89 pitches, 59 (66 percent) for strikes.
Thanks for coming The Mariners and Indians drew 17,878 to Progressive Field on Sunday afternoon. First pitch was at 1:10 p.m. with a temperature of 42 degrees. The four-game weekend series drew 65,518 fans.
Texas comes to town for a three-game series at Progressive Field. Right-hander Trevor Bauer (2-2, 2.41) will face the Rangers and lefty Cole Hamels (1-4, 4.41) in the opener at 6:10 p.m. tonight. SportsTime Ohio and WLKR 95.3 FM will carry the game.