I'm not buying the theory that Irvin disappears or is invincible at all. If that were the case, he would not be on the field as much he is. He just finished his first season playing a new position and he hit some road bumps - that's obvious by his limited amount of snaps in the Super Bowl, but throughout the year he still got a good amount of run from our coaching staff.
We're being thrust into the conversation of possibly having one of the top 3-5 defenses ever - especially when you account for the current offensive environment of the NFL. The fact that he started 12 games tells me enough about his ability and what he does on the field. The coaches know Irvin's abilities much more than I do. And despite what some say, the box score absolutely does not tell the entire story all of the time, whether you're a safety, corner, or outside linebacker.
Someone else said it, but I'll say it again because of its sheer truth - this is not an either/or preposition here. It doesn't matter who starts. Both players figure to be in the future plans of this defense. It's fun to discuss it, but I'm seeing some people saying things like Irvin is invincible and doesn't make his presence known on the field, and I think that's way off the mark.
Either one can start. Both will play, and play well. It will be interesting to see what type of role Irvin has on this defense next year. While some of the fans here think the Irvin LB experiment has failed, the coaches likely have a very different opinion. I want to see him take a big step forward next season and I believe he will.