The whole point of him getting a few carries against teams like Air Force, Navy, and Stanford is so he can take away Walker's starting spot for the biggest game of the year?
Uh, does "implemented" mean "given the starting spot"? Are you dense? And how is it a "stupid thing to say" that a 5 star running back is better than a 3 star running back? It may be correct, or not, but to say a 5 star freshman back in college is better than a junior who was a 3 star back (and who has been good but has not exactly been a world beater in his 3 years) is hardly a "stupid" opinion.
As for asking "Oh yea well if he's so good why isn't he starting huh why isn't he starting if he's so good you big idiot!", now THAT is stupid. It's also disingenuous, to act like Weis thinks Walker is clearly the better back, and that's why he's starting. It's not. Aldridge, for one, is a freshman, which makes it difficult to unseat a two-year starting upperclassman who's had back to back 1000 yard seasons. I know, I know. "Weis will always play the better guy!" That looks good in the press conferences, but it's a little harder to tell your workhorse junior running back to move over, you've just brought in a better player. More importantly, Aldridge was hurt. If he hadn't been hurt, honestly, he might be starting by now, or "as good as" starting, which means featured in a 50/50 split backfield. It's not an accident that he's been out there more and more, and earlier and earlier in games. He was in against AF, what, second series? That's not for nothing. The kid is legitimately good. He was our biggest recruit last year other than Sam Young, who's starting. And next year he'll either be starting or splitting carries. Of course I expect next year to be more ball control, whoever the QB is.