He was the DC, not the OC (OC is Andy Ludwig).
Anderson is going to stick around for the game, but in a limited role. Coach Whit actually announced his replacement last night (linebackers coach Kelani Sitake), so my guess is that Whittingham (who was the DC for years prior to becoming the HC), Sitake, and Anderson will all be putting their heads together in regards to gameplanning. I would be shocked if there were any sort of drop-off.