The Chiefs placed Omenihu (knee) on the reserve/PUP list Tuesday, Ian Rapoport of NFL Network reports.
Omenihu missed all of training camp as he continues his rehab from a torn ACL suffered in the AFC Championship Game against the Ravens last postseason. His placement on PUP knocks Omenihu out for at least the first four games of the season. George Karlaftis and Chris Jones will key Kansas City's pass rush while Omenihu gets healthy.