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04/20/12 8:10 PM ET

Harrison, Rangers postponed until Saturday

DETROIT -- Matt Harrison had to pitch in the rain last Friday night against the Twins. Then he had his next start pushed back two days because the Rangers wanted Yu Darvish pitching on four days' rest.

Now Harrison will have to wait one more day. The Rangers' game with the Tigers on Friday night was postponed by rain, and the two teams will play a day-night doubleheader on Saturday at Comerica Park.

The first game will be at 12;05 p.m. CT, and the second game is scheduled for 6:05 p.m. at Comerica. Harrison, who was scheduled to pitch Friday, will pitch the first game, and Neftali Feliz will start the second game for the Rangers. Rick Porcello will pitch the first game for the Tigers and Justin Verlander will start the second game.

"What's another day?" said Harrison, who will be pitching on seven days' rest. "I was already pushed back, so one more day won't matter."

The Rangers take a seven-game winning streak into Saturday, and an overall record of 11-2, the best in the Major Leagues.

"You always hate to miss a game," manager Ron Washington said. "If you've got to play, you want to play."

The first game of Saturday's doubleheader will be on FOX Sports Southwest and KESN 103.3. The second game will be on TXA 21 and KSKY 660 AM.

Washington is still planning to use Ian Kinsler at designated hitter in the first game on Saturday, and Adrian Beltre will do so in the night game. That will allow the manager to use Michael Young at second base in Game 1 and third base in Game 2.

The postponement means the Rangers will likely have to use a sixth starter for the first time this season on Wednesday against the Yankees. Colby Lewis is scheduled to pitch on Sunday for the Rangers, followed by Derek Holland on Monday and Darvish on Tuesday against the Yankees.

The Rangers are unlikely to bring back either Harrison or Feliz on three days' rest against the Yankees on Wednesday. So they would have to bring somebody out of the bullpen, most likely Scott Feldman.

Feldman was used as a starter in Spring Training, and the Rangers expect he'll be able to throw at least 60 pitches on Wednesday. He'll still be available in the bullpen on Saturday for the doubleheader.

"I'm still stretched out, so however long they let me go, I'll be ready," Feldman said.

T.R. Sullivan is a reporter for MLB.com. Read his blog, Postcards from Elysian Fields, and follow him on Twitter @Sullivan_Ranger. This story was not subject to the approval of Major League Baseball or its clubs.