CLEVELAND -- Luis Valbuena wanted to show his former team what he could do.
"I never hit a walk-off homer before," Valbuena said with first base coach Luis Rivera acting as interpreter. "Maybe in Little League."
Valbuena lined a 2-0 pitch from right-hander Randy Messenger (0-1) over the right-field wall for his seventh homer to cap Cleveland's comeback. The Indians trailed 3-0 after one inning.
"I knew it was going," said Valbuena, a 23-year-old infielder from Venezuela who was acquired from the Mariners in a December trade. "I don't try for home runs. I try to hit with a lot of good contact.
"I wanted to make a good impression on [the Mariners]. I was running the bases like I was on air."
Messenger, who has pitched parts of five seasons in the majors, had his contract purchased from Triple-A Tacoma earlier in the day when the Mariners optioned out Chris Jakubauskas. The 28-year-old Messenger entered with a 4-11 record in 161 career games, all in relief.
"You'd like to be able to get guys back in a situation where it's not so critical." Mariners manager Don Wakamatsu said. "A game goes along and you get into extra innings and you use who you have to use. He got two quick outs and I think the pitch got too much of the plate."
Messenger said he knew it was a homer as soon as it left the bat and wasn't surprised since he had seen Valbuena get some big hits when they were teammates in the Mariners' minor league system.
"He guessed right and I paid the price," Messenger said.
Rafael Perez (2-2), the sixth pitcher used by Indians manager Eric Wedge, got one out to record the win, Cleveland's fourth in 10 games.
"The bullpen was fantastic," Wedge said. "We really had to work them hard and they came through."
Seattle's Ichiro Suzuki went 0-for-5 with a walk, ending his 12-game hitting streak and keeping him 12 hits short of 2,000 for his career. The nine-time All-Star popped out on a 3-0 pitch in his final at-bat in the 11th.
Suzuki needs 17 hits for his ninth consecutive 200-hit season, which would break the career record he shares with Hall of Famer Willie Keeler.
Four Seattle pitchers held the Indians hitless over 6 2/3 innings until Valbuena connected.
Cleveland chipped away at Seattle's lead with single runs in the third, fourth and seventh, scoring the tying run without a hit.
Valbuena reached second leading off the seventh when left fielder Michael Saunders dropped his fly ball for an error. Kelly Shoppach then squared to bunt as Mariners starter Doug Fister threw a fastball high and inside, hitting the Indians' catcher on the hand.
"The mistake on the fly ball changed the outcome of the ballgame," Wakamatsu said.
Indians starter Aaron Laffey allowed three runs in the first, then settled down nicely. The left-hander gave up eight hits and three runs over seven innings.
"I wasn't finishing my pitches in the first," Laffey said. "Then I just tried to keep putting up zeros and got help from my defense."
Russell Branyan's two-run homer, deep into the seats in right-center, capped Seattle's first inning. The first run scored when right fielder Shin-Soo Choo was charged with an error after his throw skipped past third baseman Jhonny Peralta. Branyan followed with his 30th homer, on a 3-2 pitch.
LaPorta scored when Asdrubal Cabrera grounded into a double play in the third and Travis Hafner hit his 12th homer in the fourth to get Cleveland within one. It was the Indians' first homer at Progressive Field since Aug. 2, a span of 11 games, two short of the team record for longest homer drought in home games set in 1991 at old Cleveland Stadium.
Fister gave up two earned runs over 6 1/3 innings in his third career start.
Seattle RHP Carlos Silva threw a 65-pitch bullpen session. He is scheduled to throw again next week, then begin a minor league rehab assignment. Silva has been out since May 7 with a sore shoulder. ... Laffey is 9-1 with a 1.86 ERA in 14 games, 13 starts, in Cleveland since May 2008. ... Indians RHP Chris Perez worked a scoreless eighth. He has not allowed a run in his last 14 outings, covering 14 1/3 innings since July 7. He has given up only five hits and struck out 17 over that span. ... Shoppach was hit twice with pitches and has been plunked an AL-leading 18 times.