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As is the norm, there are big names who have moved on down the road in the Pac 10. From bowl-winning QB's to standout running backs, the list is a long one. But clearly one of the most exciting things about an upcoming season of college football is always the element of the unknown. What young players are waiting in the wings? What hotshot recruit with all the whispers that he is going to be special will finally be unleashed for public consumption? But as is usually the case, the young replacements come in to take the spots of some pretty established players who leave a large body of work behind them. With that, we look at the five biggest Pac 10 shoes that must be filled and the candidates to replace them.

JOHN DAVID BOOTY, QB, USC

The QB position for USC is always a glamor spot, and a perfect place to start. John David Booty came into the 2007 season as everyone's Heisman favorite, and for good reason. Booty was coming off a 2006 breakthrough performance, throwing for over 3300 yards and 29 TD's. But while USC went 11-2, won a share of the conference title, and Booty capped off his senior season with a fine performance in a Rose Bowl blowout of Illinois, still, things didn't quite work out. He threw for nearly 1,000 fewer yards in 2007 than he had the prior year. A broken finger on his throwing hand had a lot to do with it, and he even missed three games due to the injured digit. But that said, Booty was more about stats. He was a leader and a winner, and could be more difficult to replace than originally thought. This year we find out if Mark Sanchez is the answer. Or will we? Sanchez, as was reported last week, suffered a dislocated knee cap during non-contact drills. While still not 100% officially ruled out for the season opener at Virginia, the latest report has his status very much up in the air. Meanwhile, Arkansas transfer Mitch Mustain and redshirt frosh Aaron Corp will run the offense in a job that suddenly appears wide open. It could be worse though. Mustain didn't go completely bananas at Arkansas, throwing for a modest 894 yards in eight starts as a true frosh year in 2006. But he did go a perfect 8-0 as a starter, so, he's got that going for him. Which is good.

If Mediocrity had a football team, its mascot would most likely wear a giant foam Mike Stoops head

Ahhh, mediocre college football. Three words that go together like turkey, gravy, and stuffing.

While the majority of space here at FanHouse and on every other college football publication will be focused on the Top 25, season after season a huge slice of the college football fan pie (mmmm...fan pie) find themselves supporting a team who would most aptly be described as thoroughly mediocre, at best. I'd venture to guess that for every legit contender, there are probably three teams with a couple of flaws so glaring that only those blinded by the partisanship of homerdom can pretend their team's downsides won't inevitably sabotage any hopes of playing in a bowl of even moderate respectability.

And therein lies one of the most cruel realities of the college football landscape: winning 6 or 7 games is no small feat, and yet every year coaches and players around the country will be abused for achieving that very milestone. Of course, when you play in a conference like the Pac 10 -- who rewards its third place finisher with a December 31 game in El Paso's Sun Bowl -- can you really be that surprised when fans and pundits are critical of barely topping out above .500?

Who from the Pac 10 will slide to the middle of the pack in 2008? Here's a quick rundown of the leading candidates for Pacific time zone mediocrity this season.