Indianapolis Colts coach Jim Caldwell isn’t ready to say how much time Jeff Saturday might miss.

Jim Irsay is.

The Colts owner told reporters yesterday that Indy’s Pro Bowl center could miss two to six weeks after having arthroscopic knee surgery to remove what the team described as a "loose body."

"We’ve seen guys come back in two weeks, you see some guys come back in six weeks," Irsay said. "You’re hoping it’s the shorter side of the scale."

Caldwell would not say how or when Saturday hurt his knee, but that he believed it occurred over time.

Singletary unhappy with missing DT

Kentwan Balmer missed his third consecutive day of practice with the San Francisco 49ers yesterday, and now it’s no longer OK with coach Mike Singletary and the team.

Singletary gave Balmer a pass Monday and Tuesday to deal with a "personal issue." Yesterday’s absence was unexcused.

"I told Kentwan to be here this morning," Singletary said. "He’s not here. He is under contract. The fact that he’s not here, that speaks to me. What it says, I really don’t know. As far as I’m concerned, I don’t know what he’s doing."

Balmer, San Francisco’s first-round draft pick in 2008, is entering the third season of his five-year, $8 million deal.

AROUND THE LEAGUE

» The 49ers waived second-year linebacker Scott McKillop yesterday. McKillop tore ligaments in his left knee during practice Aug. 4 and had season-ending surgery two days later. If he clears waivers, he will be placed on San Francisco’s injured reserve list.

» Browns starting inside linebacker D’Qwell Jackson injured his right pectoral muscle Tuesday, but it is not the same muscle that he tore last year, causing him to miss the final 10 games of the 2009 season. Still, Jackson could still miss a significant amount of time because of his recent setback. More testing, though, still needs to be done to determine the severity of Jackson’s new injury, said Neal Gulkis, Browns vice president of media relations.

» With their top three running backs sidelined, the Denver Broncos brought in the versatile 30-year-old veteran running back Justin Fargas yesterday. The Broncos are missing Knowshon Moreno (hamstring), Correll Buckhalter (back) and LenDale White (leg).

» New Orleans Saints running back Lynell Hamilton has torn the ACL in his right knee and is expected to miss the entire season.