John Beck will start for the Redskins on Sunday against the Panthers, replacing Rex Grossman. The two took turns Wednesday expressing excitement and frustration, just as they did six weeks ago after Grossman beat Beck for the job coming out of training camp. "Things change," Beck said, "in the blink of an eye." Grossman was replaced by Beck in the fourth quarter Sunday after throwing four interceptions in a 20-13 loss to the Eagles.