Porter (groin) is listed as questionable ahead of Sunday's game against the 49ers, Ryan McFadden of ESPN.com reports.
Porter continues to deal with the groin injury he suffered early in the first quarter of the Raiders' Week 8 win over the Jets. If the cornerback cannot suit up for Sunday's contest, Jermod McCoy or Hezekiah Masses will likely start at outside cornerback across from Eric Stokes.