Kansas City Chiefs head coach Andy Reid enjoyed a record-setting homecoming in Philadelphia after becoming the first coach in NFL history to win 100 games with two teams.

Reid saw his Chiefs take down former team the Eagles 42-30 on his return to the place where it all began on Sunday.

The 63-year-old spent 14 seasons with the Eagles, where he started his head coaching career in 1999 and compiled a 140-102-1 record (including playoffs) with a trip to the Super Bowl following six NFC East championships.

After leaving at the end of the 2012 season, Reid was appointed by the Chiefs in 2013 and he has since delivered a Super Bowl to Kansas City – Super Bowl LIV.

"The people here have been phenomenal since I got here," Reid said after the Chiefs moved to 2-2 for the season, having lost their previous two matches.

"My room was loaded with food so it was good to have a cheesesteak and a lot of other things. It's good to be back."

Asked if his Philadelphia return made him emotional, Reid – who was hospitalised following the Chiefs' loss to the Los Angeles Chargers last week – added: "I'm pretty good. You want me to cry up here?"

Kansas City star Patrick Mahomes threw five touchdown passes to fuel the Chiefs in Week 4 and he revelled in Reid's achievement.

"It was definitely exciting to get him that win," Mahomes said. "We were due to get him that win, it had been a couple of weeks now, but I’m glad we got to do it in Philadelphia and around where he kind of came into his own.

"And now he's in Kansas City, and it's a good thing he's here with us."