ARLINGTON -- Melky Cabrera earned All-Star Game MVP honors for his efforts against Ron Washington's American League squad last month. Bartolo Colon tossed eight shutout innings against Washington's Rangers in an A's victory the month before.

Yet Washington was saddened by the news that they were both suspended 50 games by Major League Baseball for testing positive for testosterone, with Colon's suspension being announced on Wednesday.

"I feel sorry for both [Colon] and Cabrera, because I always had respect for them," Washington said. "He was the veteran that was holding that young Oakland A's staff together. They'll get over it, but I think initially it'll affect them because it'll put added pressure on other people. Melky, I thought he was an offensive juggernaut in San Francisco."

The 2005 Cy Young Award winner, Colon was 10-9 with a 3.43 ERA in 24 starts this season while Cabrera was batting .346 with 11 home runs, 60 RBIs and a Major League-best 159 hits when his 50-game suspension began last week.

"All I can say is to not mess with Major League Baseball. They will get you," Washington said. "That just shows that the drug program is working. I don't think people are just trying to beat the system in baseball. They're trying to beat the system everywhere. I don't care what they've got in place, there will always be people trying to beat the system."

Oswalt doesn't expect regular rotation work

ARLINGTON -- Though he will be making his second start in five days, Roy Oswalt does not see himself as a starting pitcher.

Oswalt will be making another spot start on Thursday when he takes over for Yu Darvish, who was scratched with tightness in his right quad. When Ryan Dempster did not make the trip to Toronto last week for personal reasons, Oswalt started and gave up one run in 4 2/3 innings as the Rangers beat the Blue Jays, 2-1, last Saturday.

"I don't think I'm in the rotation. I think I'm just making another start," Oswalt said. "I'm just doing what I'm told. If they tell me I need to start Thursday, that's what I'll do. They haven't explained what kind of role I'm in."

Oswalt went 3-2 with a 6.49 ERA in his first six starts this year before being moved to the bullpen when the Rangers acquired Dempster at the Trade Deadline last month. Since then, Oswalt is 1-0 with a 4.50 ERA in four appearances, three of them as a reliever, and is holding opponents to a .194 batting average.

"Nothing really changed to me," Oswalt said. "It's just a matter of time before I get going. I'm not going to go up there and throw up a 1.00 ERA all year, but I have thrown up a 2.00 before. It's just a matter of time before it comes around."

One step left for Uehara before rejoining Rangers

ARLINGTON -- Koji Uehara tossed one scoreless inning in the first outing of his rehab assignment for Triple-A Round Rock on Tuesday, striking out two and throwing 14 of 18 pitches for strikes. He is expected to pitch another inning for Round Rock on Friday before returning to the Rangers on Sunday.

"He threw the ball well," manager Ron Washington said. "The ball came out of his hand freely. I haven't seen him today. I hope everything works out. He's got one more to go, and hopefully, he'll be ready to compete again."

Uehara has been on the 15-day disabled list since June 15 with a strained right lat muscle. He made one rehab outing with Round Rock, pitching one scoreless inning July 14 before suffering a setback and being forced to wait until this week to begin another rehab assignment. He posted a 2.11 ERA in 20 appearances for the Rangers this season, striking out 22 and walking two in 21 1/3 innings.

Worth noting

• Manager Ron Washington said that Mike Olt should start in Thursday's series opener against the Twins, who will send left-hander Scott Diamond to the mound, although he is not sure at which position. Olt has not started since last Friday against the Blue Jays.

• Class A Spokane outfielder Royce Bolinger extended his hitting streak to a Northwest League-best 22 games by going 2-for-4 on Tuesday, while Triple-A Round Rock shortstop Luis Hernandez went 0-for-4, snapping a 16-game hit streak.

• Michael Kirkman, Tanner Scheppers and Robbie Ross combined to throw four scoreless innings in relief of Scott Feldman in Tuesday's 5-3 loss to the Orioles, giving the Rangers bullpen 13 1/3 consecutive scoreless innings entering Wednesday. The Rangers bullpen's 1.13 ERA since Aug. 11 is the third-best in the Majors, behind the Rays (0.33) and the Royals (1.11).