Kansas City, Mo. ? Vonnie Holliday and Brett Favre, together again at Lambeau Field.

But Sunday, Holliday won’t be cheering for the Green Bay Packers’ quarterback. He’ll be chasing him.

“I’m sure it’s going to be emotional,” said Holliday, whose play at right defensive end has helped the Kansas City Chiefs start the season 5-0 for the first time ever. “But I don’t plan to cry or anything.”

Holliday, Green Bay’s first-round pick out of North Carolina in 1998, joined Kansas City in the offseason as a free agent. He leads the Chiefs with four sacks, even though he was hampered by a groin strain in Sunday’s 24-23 win over the Denver Broncos.

“Hopefully, he’ll be a much more physical presence in the ballgame this week,” coach Dick Vermeil said Tuesday. “He’s been outstanding. That position last year produced a sack and a half, and he’s already produced four. He’s also made a strong contribution to our run defense.”

With Green Bay, Holliday had 32 sacks in 68 games. He holds the club record with five against Buffalo last Dec. 22 — a game in which he also forced three fumbles.

“I hated to see him go, but that’s the way this business works now,” Favre said Wednesday. “I think he’s a tremendous player and a tremendous person. He’s just a great guy to have in the locker room as well as on the field.”

That potential has Vermeil expecting even better things from his new sacks leader.

“I think he’s made an outstanding contribution,” Vermeil said. “I’ve told Vonnie this — there is more to get out of Vonnie Holliday.”

Kansas City's Vonnie Holliday sacks Minnesota quarterback Daunte Culpepper (11) during a preseason game Aug. 16. Holliday will meet his former team Sunday when the Chiefs travel to Green Bay to play the Packers.

Favre and Holliday have already met once this year — in the preseason Hall of Fame game at Canton, Ohio, when Holliday rushed in unblocked and knocked down his former teammate on Green Bay’s first snap.

Holliday pulled up as he hit Favre — likely preserving the quarterback’s health.

“I didn’t expect to get hit by anybody that early in the year,” Favre said. “I thanked him for taking care of me.”

Things will be different this time, Holliday said.

“Brett’s a guy I have a lot of respect for, and that was preseason,” he said. “But this time, the bullets are live, as they say. I plan to get after him a little bit.

“Once the whistle blows, it’s football, and we’ve got to go up there and get the victory.”

While Holliday will be on familiar ground Sunday, most of his teammates won’t. Kansas City has not played at Lambeau since 1990.

“That place is almost like the cradle of football,” said defensive end Eric Hicks. “But we’re going up there to do a job. We can’t worry about all that mystique.”