"Any time you win a hard-fought game, it adds to the confidence of your club and adds to the toughness of your club," Kinsler said.
Kinsler started the winning rally with a one-out single against Farquhar (0-2) for his fourth hit. He advanced on Adrian Beltre's single and then swiped third. After A.J. Pierzynski fouled out, plate umpire CB Bucknor called a balk on Farquhar with Alex Rios at the plate, allowing Kinsler to come home.
"It was a balk. Very minor, but it was a balk," Farquhar said. "I had to go back and look at the video to see it, because at the time I had no idea. It was the slightest flinch."
Texas manager Ron Washington gave Kinsler credit for noticing Farquhar was using a high leg kick and then stealing third to be in position to score on the balk -- a violation Washington didn't notice.
"I just saw CB yelling balk and started smiling," Washington said.
"Scheppers was dynamic tonight," Washington said. "He just overpowered them, and we certainly needed that right there."
A day after coming off the disabled list, Franklin Gutierrez homered for the first time since June 22 for Seattle, which has lost five straight.
All the runs prior to the odd 10th inning came when both starters ran into trouble early before settling down, turning a tie game over to the bullpens after six innings.
Texas starter Derek Holland allowed three runs and six hits, walked four, and struck out five. The left-hander is unbeaten in his past six starts, with five no-decisions in that stretch.
Holland credited Kinsler for coming over in the dugout after the first inning and helping get him back on track.
"Saying a few things to me to get me back in my groove and calm me down," Holland said. "I got a little frustrated, let my emotions eat me up a little bit, but after that, I felt like I settled down and got stronger as the game went on."
Mariners starter Hisashi Iwakuma struck out the side in the first but ran into trouble of his own in the second, allowing three runs on four hits, including RBI singles by Mitch Moreland, David Murphy and Elvis Andrus.
Iwakuma needed 55 pitches to get through those first two innings but cruised through his last four, allowing only a pair of singles after the second. The Japanese right-hander yielded seven hits, struck out seven and walked one.
Gutierrez tied it at 3 with a leadoff drive to center in the third. Gutierrez, who missed much of the season with hamstring issues, has six home runs in 69 at-bats.
The Mariners looked ready to close out the game in the ninth but were unable to score after a promising start to the inning.
Michael Saunders led off with a single, and Dustin Ackley followed with a bunt. The ball popped off his bat to the pitcher's mound, but reliever Neal Cotts had rushed in and the ball went over his head, giving Ackley a single.
Scheppers then came in and escaped the threat. Humberto Quintero also popped up his bunt, which was caught this time by first baseman Moreland. Pinch hitter Nick Franklin and second baseman Brad Miller struck out to send the game to extra innings.
"My job is just to go out there and minimize the damage," Scheppers said. "You've just got to go out there and do the job."
Seattle C Mike Zunino, who has been on the disabled list since July 26 with a broken bone in his left wrist, started a rehab assignment with Triple-A Tacoma. "He'll be down there the rest of the week, and we'll see where we're at," Mariners manager Eric Wedge said. ... The Mariners closed the clubhouse before the game for a team meeting. "I just wanted to talk to them," Wedge said. "What I'm seeing is not what we're about. Not that they're playing bad baseball, they haven't, but we just haven't scored any runs." ... Beltre's 10th-inning single extended his 12-game hitting streak against the Mariners. ... Holland has not lost in his past 11 road starts, the third-longest streak in team history.