The Chiefs placed Long (knee) on the reserve/PUP list Tuesday.
Long will be inactive for at least the first six weeks of the regular season after the move. The 32-year-old came out of retirement to join the Chiefs and compete for a job at right guard, but it remains to be seen if he can return to his Pro-Bowl caliber level. Laurent Duvernay-Tardif has returned after opting out of the 2020 campaign and will compete with rookie Trey Smith for the starting role while Long is sidelined.