Indianapolis ? Tony Dungy doesn’t doubt Bob Sanders will be back in the Colts lineup this season. He’s just not sure how long Sanders will be out.

The 2007 defensive player of the year could miss up to six weeks after spraining his right ankle last weekend at Minnesota, and team officials are contemplating whether Sanders may need arthroscopic surgery on his knee, too.

“It’s kind of similar to (receiver) Roy Hall’s injury,” Dungy said. “He had his knee scoped, too, so he’s going to be out a while longer. If it’s going to be two or three weeks, then it makes sense to get it scoped. But (defensive tackle) Keyunta Dawson had the same kind of thing and he told me he was going to practice today, so we’re not really sure.”

Team president Bill Polian was more definitive Tuesday night while taping a segment for his Saturday night television show on WISH-TV. Polian said Sanders would miss four to six weeks.