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09/11/09 11:03 PM ET

Rainout forces Texas twin bill on Sunday

Millwood pushed back to start Saturday vs. Mariners

ARLINGTON -- The Rangers' game with the Seattle Mariners on Friday was postponed because of rain.

The game will be made up as part of a doubleheader on Sunday with the first game beginning at 12:35 p.m. CT at Rangers Ballpark in Arlington. There will be a single admission to both games.

Kevin Millwood was supposed to pitch on Friday for the Rangers. He has been pushed back to the 7:05 p.m. CT Saturday game against Brandon Morrow for the Mariners. Tommy Hunter and Derek Holland will pitch the doubleheader on Sunday.

"We don't need another day off," Rangers manager Ron Washington said. "But you can't go against Mother Nature. It's something we have to adjust to. We've been adjusting all year."

Friday's game was postponed after an official delay of two hours and 30 minutes. There was some discussion about a doubleheader on Saturday, but the forecast is not favorable. The Rangers have swept all three doubleheaders they have played this season.

The immediate delay will likely force the Rangers to find a sixth starter for Wednesday's game against the Athletics. Dustin Nippert is the leading candidate, but Doug Mathis and Guillermo Moscoso are also possibilities.

Millwood was scheduled to pitch Wednesday on his normal four days' rest. But now that he has been pushed back to Saturday, it's unlikely that he'll come back Wednesday on three days' rest.

"We have to see what we're going to do on Wednesday," Washington said. "We haven't sat down and talked about it yet."

Fans holding tickets for Friday's game can exchange them for any home game the rest of the season, including Sunday's doubleheader, subject to availability. Ticket exchanges can be made beginning Friday night at the West Box Office at Rangers Ballpark in Arlington.

The postgame fireworks scheduled for Friday night have been rescheduled for Saturday, Sept. 26 vs. Tampa Bay as part of Fan Appreciation Weekend.

T.R. Sullivan is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.