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09/21/12 10:18 PM ET

Napoli continues to rest, expected back Saturday

SEATTLE -- Mike Napoli, who has made three starts behind the plate and one at DH since being activated from the disabled list (left quad injury) last Saturday, was out of the starting lineup for a second consecutive game Friday.

Manager Ron Washington said it was his plan all along to have Napoli rest Thursday in Anaheim and Friday in Seattle and that Napoli will start Saturday against the Mariners.

As for Sunday, the manager said Napoli might get a start behind the plate or he might serve as DH again.

"It's all good with Napoli," Washington said. "But we've still gotta take care of him."

Hamilton in Texas attending to sinus problem

SEATTLE -- The Rangers will have to get by this weekend without Josh Hamilton, who is back in Texas dealing with sinus issues that have left him with some vision problems.

Texas manager Ron Washington said that Hamilton was fine until just before game time in Thursday's series finale against the Angels in Anaheim. He made it through stretching without a problem, but clearly wasn't himself doing some defensive work during batting practice.

"He took a ground ball, catch and spin, and lost his balance," Washington said. "Then he misjudged a fly ball. It's no big deal; everybody misjudges fly balls. But we decided we weren't going any further with him."

So while the Rangers flew up the coast to Seattle, Hamilton flew home to get some tests to see where he stands medically. The Rangers aren't expecting him to be in Seattle for the three-game set with the Mariners.

They are hopeful that Hamilton will play against the A's in a four-game set that starts Monday in Arlington, but that's up in the air.

"We're going to do all we can to ease his mind," Washington said. "Once he has peace of mind, he'll be fine."

Asked what he meant by "peace of mind," Washington said that once the tests are over and the medical crew can explain what's been happening, the veteran center fielder will be able to deal with it.

"He will play for us again (this season)," Washington said.

Hamilton had only missed 11 of the Rangers' first 149 games coming into the weekend.

Beltre stays in L.A. area to deal with stomach issue

SEATTLE -- While most of his teammates were heading north to Seattle, third baseman Adrian Beltre spent the day in Southern California being tested for ongoing gastro-intestinal problems.

Beltre hit the game-winning homer Thursday in Anaheim, talking his way into the lineup after missing Wednesday's start with stomach issues. But when his stomach didn't feel any better, Beltre remained behind.

He makes his offseason home in the Los Angeles area, so he was able to take it easy when he wasn't being poked and prodded by the medics. And while he spent part of the day being tested, the issue is not thought to be major. He's expected to be in the starting lineup against the Mariners on Saturday.

"We decided not to fly him up here tonight; he wasn't going to play," manager Ron Washington said. "It's best for him to rest and come in in the morning."

Beltre wasn't supposed to play Thursday; Jurickson Profar was in the original starting lineup. But Beltre went to Washington and all but demanded a chance to play.

"There's so much he brings to this team," Washington said. "Other guys see that, and they take notice. It's what a leader does."

Worth noting

• Roy Oswalt, who has been dealing with right elbow soreness, came out of Thursday's bullpen session without issue and was available to face the Mariners out of the bullpen. Oswalt has started in nine of his 13 appearances with the Rangers, but it's not clear if he will get another start as Texas gears up for the postseason.

• Matt Harrison, Saturday's starting pitcher, comes into the game with 17 wins. Should he beat Seattle, that victory would match him with Kenny Rogers (2004) for the most wins ever by a Rangers lefty. No pitcher, right-hander or lefty, has won 18 games for the Rangers since Rogers last did it. Harrison comes into the game 4-0 against Seattle this year and 9-0 in his last nine starts against the Mariners.

• Yu Darvish, Thursday's winning pitcher for the Rangers in Anaheim, has 16 wins overall and four consecutive starts of seven or more innings allowing four hits or less. "He's gotten better and stronger as the year has gone on," manager Ron Washington said of the first-year pitcher from Japan. "It took him awhile to get to where he's just competing. He's not guessing any more. This is who he is."

John Hickey is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.