DETROIT -- Hisashi Iwakuma tossed eight shutout innings to lead the Seattle Mariners to an 8-0 win over the Detroit Tigers on Wednesday at Comerica Park.
Iwakuma (13-6), who gave up four hits and struck out six, has pitched a club-record 25 consecutive scoreless innings on the road. Iwakuma also blanked the Tigers in 14 innings this season. Detroit, which saw its three-game winning streak snapped, was shut out for the 11th time in 2013.
Justin Smoak had two hits -- including his 17th homer -- scored three runs and drove in two for the Mariners, who had lost eight of their last nine coming into Wednesday's game.
Michael Saunders supplied a pair of run-scoring doubles and Franklin Gutierrez added three hits, including a solo homer.
Justin Verlander (13-12), who gave up three runs in seven innings, lost for the fourth time in his last five decisions. The Tigers entered the day with a six-game lead over second-place Cleveland in the American League Central.
Smoak ripped his opposite-field, solo homer with two out in the sixth to give the Mariners a 3-0 lead. Smoak and Saunders drove in runs during Seattle's four-run eighth against relievers Phil Coke and Al Alburquerque.
Michael Saunders' third extra-base hit in the past two games sparked the Mariners' two-run second. He drove a double into the gap in left-center to knock in Smoak, who opened the inning with a walk. Nick Franklin's single brought home Saunders.
Iwakuma wriggled out of two bases-loaded jams during the first four innings to keep the Tigers scoreless. Iwakuma snuffed out the initial threat by striking out Matt Tuiasosopo in the first inning. He escaped damage in the fourth by inducing a double-play grounder from Hernan Perez.
NOTES: Tigers 2B Omar Infante and RF Torii Hunter were not in the lineup. Infante felt some tightness in his quad Tuesday, but manager Jim Leyland said he's fine. Hunter is hitting .179 with no homers in 56 September at-bats. Both will be back in the lineup for the series finale Thursday afternoon. ... Detroit rehired Larry Parrish as manager of Triple-A Toledo. Parrish managed the Mud Hens in two previous stints and served as the Tigers' manager in 1998-99. He replaces Phil Nevin, who was fired after the minor league season. ... Seattle's third-year manager Eric Wedge, who is on the hot seat, feels that it would be a mistake for the organization to make wholesale changes. "When you sign up for a rebuild like I did, you know you're going to have some tough days," he said. "You're not going to see the wins you'd like to see right way. If you're going to do it the right way, you've got to stick with it. If you don't, they pull the cord on it and start all over. How's that worked out for them? You've got to stick with something at some point in time." ... The Mariners have 12 walk-off losses this year and 48 over the past four seasons.