The severity of the MCL sprain is still unknown. Tom Coughlin said his safety is week-to-week and will get an MRI.
It's a bad sign that Phillips was unable to re-enter the game, but X-rays did come back negative.
Phillips is just the latest Giants defensive back to join the injured list. Cornerback Corey Webster played through a broken right hand and safety Antrel Rolle played despite a knee contusion.
Rolle was beat -- badly -- by DeSean Jackson on a touchdown reception against the Eagles last night.
Prince Amukamara tweaked his ankle in the second half of the Eagles game, but he said he was fine after the game. In his first career start, the former Cornhusker help Jeremy Maclin to one catch.
If Phillips cannot go, Stevie Brown and Tyler Sash are candidates to fill in v. Cleveland. Brown played most of Sunday night.
Sash is returning from a four-game suspension after testing positive for Adderall, a violating of the NFL's performance-enhancing policy.
Hakeem Nicks' status up in the air
After sitting out the last two games, Coughlin admitted he doesn't know when Nicks will be able to return.
Nicks needed surgery to repair his broken right foot in the offseason, and the injury flared up in recent weeks. Now, Nicks added a knee injury to the list.
Coughlin said he is unaware of any improvements in Nicks' knee.
With Nicks out, Domenik Hixon and Ramses Barden will continue to see time at receiver. Hixon led all Giants in receiving yardage v. the Eagles.
This does not appear to be a good sign for Nicks or the G-Men.