Broncos starting weak-side linebacker Brandon Marshall sure sounds as if he’s going to play in Sunday’s AFC divisional playoff game against the Indianapolis Colts.

“I’m good. If it’s up to me I will be out there,” Marshall said after Friday morning’s practice. “Today was the best I felt, and I sprinted for the first time.”

Marshall, who lead the Broncos with 110 tackles (88 unassisted), injured his right foot in Denver’s game at San Diego on Dec. 14. He missed the final two regular-season games against Cincinnati and Oakland.

Coach John Fox said Marshall was a “limited participant” Friday because of the lingering foot injury, and Marshall is listed officially as questionable for Sunday’s game. However, Marshall has definitely made progress this week and it appears likely that he will play.

The question now becomes how much he’ll be able to stay of the field. During the regular-season he was an every-down player, playing in base defense and in nickel packages as well. His role could be more limited on Sunday.

Fox said the decision to suit up Marshall will be a game-day decision.

“It’s something where we will make that decision an hour-and-a-half before kickoff,” Fox said.

Meanwhile, back-up defensive end Quanterus Smith is out for Sunday’s game because of a knee injury.

Fox said he was pleased with his team’s week of practice leading up to the playoffs.

“I think, just like we have done all year, the guys had a good week of practice,” he said. “We were focused, and I thought it was a very good week of practice.”

Patrick Saunders: psaunders@denverpost.com or twitter.com/psaundersdp