That left one roster spot open, so the Royals will promote another pitcher in time for Tuesday night's game against the White Sox.
Sweeney went on the DL because of a strained left wrist, the result of a baseline collision last Wednesday. Burgos has a strain in his right rotator cuff, which caused him to leave Sunday's game. Affeldt reaggravated a left groin strain that put him on the DL from April 16 to June 3.
General manager Allard Baird said that Huber, who was hitting .332 with nine homers and 50 RBIs, probably would be with the Royals only until Sweeney is ready to play.
A converted catcher, Huber is spending his first season at first base under the tutelage of manager Frank White and coach Nelson Liriano.
"They've got over 30 years of experience between them. You couldn't ask for better coaching than that, really," Huber said.
"I was having fun and swinging the bat well, learning a new position as well and you couldn't ask for anything more."
He spent two days in Kansas City last weekend, working with hitting coach Andre David in the cages, then returned to Wichita for a Sunday evening game.
"Frank called me into his office after the game and gave me the great news," Huber said.
Gobble, a left-hander, will be used in relief after making 12 starts for Omaha with a 2-7 record and 6.48 ERA. Last season, Gobble was in the Royals' rotation and, at 9-8, was the team's only pitcher with a winning record.
This spring, however, he lost his Major League spot.
Baird said reports on Gobble indicated he's had better stuff and results in his first two innings of work, meaning that relief could be his niche instead of starting.
"Allard called me a couple of days ago and asked me if I'd be willing to try it," Gobble said. "I guess we'll see how it works out."
Gobble made his only Major League relief appearance on April 13, 2004, against Minnesota when he replaced Kevin Appier and went six scoreless innings.
Although Burgos' problem might pass quickly, Baird didn't want to leave himself a pitcher short with two games left against the first-place White Sox and a visit to hitter-friendly Colorado coming up.
Baird wouldn't identify who will replace Burgos in the bullpen, except to say that he has not yet pitched in the Majors this season.
Sweeney, who had a cortisone shot in his wrist on Sunday, expected to be disabled. The move is retroactive to June 16, the day after he was injured in a collision with the Dodgers' Jayson Werth.
Doran joins staff: Billy Doran was added to the Royals coaching staff, taking over first base duties from Joe Jones.
A former Major League second baseman, Doran was hired from the Yankees organization. He was a coach for Single-A Tampa.
"We go way back," manager Buddy Bell said. "We played together in Houston. He was field coordinator in Cincinnati when I was farm director. I always said the next managing job I get, I wanted him with me."
Doran, 47, also will become infield coach, freeing Bob Schaefer to concentrate on being the bench coach.
Jones will be reassigned in the baseball operation department and will handle the same job he
had last season, scouting and doing special assignments for Baird. Jones is in his 43rd season of pro baseball.
Bell expects no more changes in the staff.
"As far as I'm concerned, this is it and this is it for a long time," he said.
Pitchers to rehab: Starter Denny Bautista and reliever Scott Sullivan will report to Triple-A Omaha on Wednesday to begin injury rehabilitation assignments.
Bautista has been out since May 14 because of tendinitis in his right shoulder. He made seven starts and had a 2-2 record and 5.80 ERA. Sullivan, who's had back problems since last season, has not pitched his year.
Farm report: Outfielder Adrian Brown (.269) had three hits in Omaha's 3-1 loss to Round Rock. ... Ryan Baerlocher pitched six innings and relievers Colt Griffin, Barry Armitage and Jonah Bayliss each worked one inning of Wichita's 3-0 win over Arkansas. Outfielder Cory Aldridge hit his 15th homer. ... Catcher Jared Price had
Class A High Desert's only hit, a single, in a 9-0 loss to Bakersfield's Thomas Diamond, 7-0.
On deck: The Royals continue their series against the first-place White Sox at 7:05 p.m. CT
on Tuesday at U.S. Cellular Field. Right-hander Zack Greinke (1-7, 5.97 ERA)
faces Chicago's Jon Garland (11-2, 3.61 ERA).