Raiders first-rounder Damon Arnette came into the season with a broken thumb, and has aggravated that problem.
According to Ian Rapoport of NFL Network, the rookie cornerback is visiting a thumb specialist today after re-injuring the thumb when he fell awkwardly on it Sunday.
Depending on what he hears from the doctor, he could miss a month or more.
That would likely mean a trip to injured reserve, clearing a roster spot but leaving the Raiders thin in the secondary for at least three weeks.
