Marshall has been dealing with a sore foot for a few weeks. Mangold sprained his right ankle against Baltimore last Sunday and was walking gingerly through the locker room Wednesday with the ankle wrapped.
Also sitting out of practice were defensive end Muhammad Wilkerson (ankle), running back Bilal Powell (turf toe), left tackle Ryan Clady (shoulder), linebacker Bruce Carter (quadriceps), tight end Kellen Davis (hip), linebacker Darron Lee (ankle), offensive tackle Brent Qvale (neck), cornerback Buster Skrine (knee) and tight end Austin Seferian-Jenkins (ankle).
Defensive tackle Sheldon Richardson was excused from practice for a personal matter.
Running back Matt Forte (knee), CB Darrelle Revis (ankle) and safety Antonio Allen (Achilles) were limited.
The Jets (2-5) play at the Cleveland Browns (0-7) at 1 p.m. Sunday.
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