I'd like to hear your opinion on the role of a backup QB. It seems to me that a backup QB is very different from, say, a backup RB. Specifically, the goal of a backup QB isn't to give opposing defenses "different looks" from play-to-play, but instead, to step in successfully and for as long as necessary, should the starting QB go down with an injury. This being the case, it seems to me that we'd want a backup QB to have the same basic skill set as our starter (i.e., a cannon-armed, pocket passer) to cause the least disruption for our own offense, given that the playbook and offensive personnel selection have been matched to exploit these same skills. And I'm not sure we have that kind of backup QB currently in place. Your thoughts? -- Scott L., Great Falls, Va.