A matchup with Rangers left-hander Matt Harrison may not help them alter that trend.
Harrison will seek to become the AL's second 12-game winner Sunday by adding to his recent dominance of the Mariners.
The left-handed hitting Jaso is 1 for 21 against southpaws this season, but is nonetheless expected to get the chance to start again Sunday.
"He's a good hitter," manager Eric Wedge told the Mariners' official website. "He hasn't had much of an opportunity against lefties. But when you talk about the way he approaches the ball, I think it's safe to say he won't be sitting for all those games. You will see him play."
Jaso and the Mariners (37-52) will try to end their recent pattern of letdowns after big offensive showings.
They scored seven runs to defeat Oakland on July 7, but combined for three over their next two games. They scored six runs in a victory over Baltimore on July 2, then totaled seven during a three-game skid.
Facing Harrison (11-4, 3.10 ERA) might not aid Seattle. The left-hander is 6-0 with a 1.91 ERA in his last six outings against the Mariners, and 8-1 with a 2.69 ERA in 11 career starts versus them.
"They are a team I've had success with in the past," Harrison told the Rangers' official website. "There is a lot of familiarity. I know what I want to do so it's a matter of executing my pitches."
Harrison has allowed two runs or fewer in each of his last six outings overall for the Rangers (53-35), but he had a seven-game win streak snapped in his final start before the All-Star break, a 2-1 loss at the Chicago White Sox on July 5. He pitched effectively in defeat, giving up two runs over eight innings to record his fifth career complete game and second this season.
"I want to carry over what I was doing from the first half, keep doing what I was doing and stay on a roll," Harrison said. "I just want to stay with the same mental focus I've had in the last eight or nine starts and continue to get better."
The Mariners will counter with Hisashi Iwakuma (1-1, 4.84) , who had a solid performance in his first major league start July 2. The 31-year-old right-hander gave up a three-run homer and two other hits over five innings, but did not get a decision in a 6-3 win over Baltimore.
"I thought he did a really nice job," manager Eric Wedge said. "One bad pitch got him, but he settled down and kept pitching out of that. A lot of people asked what I expected out of him and I said just give us a chance to win the ballgame."
Iwakuma will try to help Seattle take the lead in the season series against the Rangers, which is tied at six wins apiece.
|July 06, 2012||Josh Hamilton||Day-to-Day||Left game - Lower back spasms|
|June 26, 2012||Mark Lowe||15-Day DL||Strained right intercostal muscle|
|June 24, 2012||Colby Lewis||15-Day DL||Right forearm tendinitis|
|June 24, 2012||Matt Harrison||Day-to-Day||Left game - left hip soreness|
|June 20, 2012||Mitch Moreland||15-Day DL||Strained left hamstring|
|June 16, 2012||Josh Hamilton||Day-to-Day||Intestinal virus|
|July 01, 2012||Erasmo Ramirez||15-Day DL||Right elbow flexor strain|
|June 30, 2012||Erasmo Ramirez||Day-to-Day||Left game - leg injury|
|June 29, 2012||Franklin Gutierrez||Day-to-Day||Left Game-Head Injury|
|June 29, 2012||Franklin Gutierrez||7-Day DL||Concussion|
|June 27, 2012||Kevin Millwood||Day-to-Day||Left game - strained right groin|
|June 13, 2012||Stephen Pryor||15-Day DL||Strained left groin|
SEATTLE (AP) -- No matter what game plan Texas' Matt Harrison takes into his starts against Seattle, or the adjustments he decides to make, they all work when facing the Mariners.
Harrison tossed a five-hitter for his 12th victory, Adrian Beltre had three hits and two RBIs, and the Texas Rangers beat the Seattle Mariners 4-0 on Sunday afternoon.
Harrison's 12th win kept him even with Tampa Bay's David Price for the most in the American League and continued his streak against the Mariners. Harrison (12-4) has won eight straight starts against Seattle and is 5-0 all-time at Safeco Field. The eight straight wins over one team is the third longest streak in Rangers' history. Charlie Hough won 13 straight against Cleveland and nine straight against Minnesota.
"I don't know what it is really," Harrison said. "I pitch against them a lot against the season. I'm really familiar with what I want to do against those guys. ... You still have to go out and execute your pitches and it seems like I've been able to do it more against this team than any other."
It was the fourth complete-game shutout for Harrison and second this season, also tossing a five-hitter against San Francisco last month. And he did it mostly without the strikeout. Harrison fanned three, tied for his season-low.
Harrison wasn't sharp early, perhaps a hangover from his rough outing in the All-Star Game when he gave up three runs on four hits. But when Harrison made a mistake, they usually came with two outs and his defense was able to help him from giving Seattle any big innings.
Harrison found a rhythm in the later innings and set down the final seven batters he faced.
"He went out there in the seventh, eighth and ninth and did what you're supposed to do as a very good pitcher when your team has the lead," Rangers manager Ron Washington said. "If you want to be in the game late, go and get those outs in the seventh, eighth and ninth. (Harrison) wants to have the ball and we had discussions a couple of months ago. If you want to finish ballgames, get outs in the seventh, eighth and ninth."
Harrison threw 114 pitches, and allowed just four singles and Brendan Ryan 's two-out double in the fifth inning.
Ian Kinsler added his 10th homer of the season on the first pitch of the fifth inning off Seattle starter Hisashi Iwakuma (1-2), who struggled through five innings. But it was Beltre an inning earlier that gave Harrison cushion to work with as the Rangers took two of three from the Mariners to begin the second half of the season.
Craig Gentry opened the fourth inning with a single and Elvis Andrus doubled to right with one-out. Instead of taking their chances, the Mariners intentionally walked Josh Hamilton to load the bases. Beltre followed by bouncing a single through the left side of the infield to score Gentry and Andrus and the second of his three singles.
"It doesn't make me mad. It fires me up because I want that challenge," Beltre said. "I don't blame other teams for doing it, but I welcome the challenge. And I like it."
Beltre was robbed of a fourth hit when Chone Figgins jumped and pulled down his line drive in the eighth. Hamilton added an RBI groundout in the first inning, his Major League-leading 76th of the season.
Seattle was shut out for the 11th time this season - tied for most in the league with Oakland - with the only offensive highlight being rookie Jesus Montero snapping a 0-for-23 skid with a single in the first inning. Seattle got base runners on Harrison but could never get a clutch two-out hit. The Mariners most promising threat came in the seventh after a one-out single by Michael Saunders and walk to Figgins. But Harrison got Ryan to ground into a double play - with a nice pick by Michael Young at first base - to end the threat.
"Once he got through the lineup a couple of times you saw him work that change-up and start getting guys off balance," Ryan said. "It shows how good his stuff is because he can go to his third pitch and it's still pretty effective."
NOTES: Texas won a road series against an AL West foe for the first time this season. ... Washington said RHP Alexi Ogando could rejoin the team on Tuesday in Oakland. Ogando has been on the DL since June 12 with a groin strain. Ogando has been on a rehab assignment with Triple-A Round Rock. ... Sunday was the 13th anniversary of the opening of Safeco Field.