Source: Marc Sessler, NFL.com 
The scrambling and elusiveness we’ve become accustomed from Pryor to were replaced by tentative play in the pocket, the result of a knee injury he suffered against the Philadelphia Eagles in Week 9.
Raiders coach Dennis Allen acknowledged Monday that Pryor’s health is more of a concern than Oakland realized before the Giants tilt.
“It wasn’t something that we thought was going to be a big factor going into the game. But, obviously, it was a factor,” Allen told reporters, per the Bay Area News Group.