First, however, manager Buddy Bell wants to see how De La Rosa fares in an injury rehabilitation start on Monday night for Double-A Wichita against Tulsa.
"We'll see what happens," Bell said. "That's when we need a spot starter, so we'll see how the rest of his rehab goes."
De La Rosa felt no ill effects in his left elbow after pitching last Wednesday for Wichita. He gave up four hits and one unearned run with one walk and two strikeouts in two innings.
"Forty-two pitches. There were a lot of foul balls," De La Rosa said.
He expects to make about 75 pitches on Monday night. He's been on the disabled list since Aug. 1, which, if he returns next Saturday, means he will have missed a full month.
The Royals open next weekend's four-game series at Minnesota with a day-night doubleheader on Friday. Gil Meche and Leo Nunez are expected to pitch for the Royals.
No Teahen party: Right fielder Mark Teahen, on the DL with a left elbow injury, now gets daily questions regarding his health, rather than his hitting.
"It's still there," he informed reporters.
"I got a couple rounds of treatment. Then I'll do some throwing. I'll do some running. I'll get a couple more rounds of treatment, and then cheer on the Royals."
Teahen feels more range of motion in the elbow and expects to be ready to play on Sept. 3.
Sweeney rehabs: Mike Sweeney, in his second rehab game for Triple-A Omaha, again was 1-for-3 with a single in the first game of a doubleheader against Round Rock. The Royals won, 5-2.
Moustakas a hit: Mike Moustakas, the Royals' first pick in this year's First Year Player Draft, made his professional debut on Saturday night for Idaho Falls in the Pioneer League.
In his first at-bat, Moustakas doubled in two runs at Ogden.
In Buck's seat: Susan Schuler of Kansas City, Kan., was in the Buck O'Neil Legacy Seat on Saturday night. A volunteer for the American Red Cross, she and her husband have traveled throughout the country helping with disaster relief after tornadoes, floods and hurricanes.
Thomson's tale: Right-hander John Thomson, signed after Scott Elarton went on disabled on June 22, is apparently finished for the season.
"We're not sure if Thomson is going to be able to pitch the rest of the year. He's got something going on in his wrist," Bell said. "He won't be looked at until Monday, so he's been when -- a month and a half? And, at the very best, it'd be the last week of the season or something like that."
Thomson made two starts and went 1-1 with a 3.38 ERA.
Royals rundown: Craig Brazell hit his 31st home run for Triple-A Omaha and his 38th overall in an 8-0, second-game victory over Round Rock on Friday. Tyler Lumsden (9-5) worked six of the seven innings in the shutout. ... Jorge Padilla's 10th home run for Double-A Wichita was a grand slam in an 8-1 rout of Arkansas. ... Mario Lisson's hitting streak reached 20 games as Class A Wilmington swept a doubleheader against Lynchburgh, 12-1 and 5-1. Rowdy Hardy won the first game, upping his record to 15-4. ... Blake Wood (2-1) went five innings to extend his scoreless streak to 17 innings in Class A Burlington's 4-3 victory over Wisconsin. ... Daniel Duffy has a 1.05 ERA and 60 strikeouts in 34 1/3 innings after five shutout innings of the rookie Royals' 10-4 win over the Padres in Arizona.
Coming up: The Royals wrap up the series against Cleveland at 1:10 p.m. CT on Sunday at Kauffman Stadium. In a matchup of right-handers, the Royals will send Meche (7-11, 3.88 ERA) against Fausto Carmona (14-8, 3.11 ERA).
At 12:30 p.m., there will be a home-run exhibition by the "Long Haul Bombers."
Dick Kaegel is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.