Williams (ribs) was cut from Jacksonville's practice squad Monday.
The Eagles cut Williams (ribs) from injured reserve Tuesday.
The Eagles placed Williams (ribs) on injured reserve Saturday.
Williams is expected to handle increased defensive snaps with Avonte Maddox (ankle) nursing a 1-to-2 week injury, Daniel Gallen of PennLive.com reports.
Williams was promoted to the Eagles active roster Thursday.
Williams agreed on a contract with Philadelphia on Monday, Adam Schefter of ESPN reports.
The Eagles cut Williams on Tuesday, Dave Spadaro of the team's official site reports.
Williams signed a reserve/future contract with the Eagles on Friday.
The Cardinals cut Williams on Wednesday.
Williams (hip) is active for Sunday's game against the Falcons.