Kelce is vaccinated, according to ESPN's Adam Schefter, so he has a chance to return in time for the Chiefs' next game on Sunday against the Pittsburgh Steelers at Arrowhead Stadium.
A total of 47 players were placed on the COVID-19 list Monday, all as a result of a positive test. That's the most the NFL has had in a single day.
The Chiefs signed kicker Elliott Fry to their active roster off the practice squad as insurance in case Butker can't return for Sunday's game.
Kelce was named on Monday to play in this year's Pro Bowl, his seventh straight selection. He leads NFL tight ends in receiving yardage with 1,066. He is second in catches (83) and fourth in touchdowns (7). The 1,000-yard season is the sixth straight for Kelce.
He is coming off the biggest statistical game of his career in Kansas City's 34-28 overtime win over the Los Angeles Chargers. He caught 10 passes for a career-high 191 yards and two touchdowns, including the game winner -- a 34-yard scoring pass from Patrick Mahomes -- in the extra period.