David Lombardi Spring practices end the retrospective glances at the last season and begin the forward-looking process of the next fall. Departed players need to be replaced and returning starters need to get better and youngsters need to step up.While some teams have more issues than others, every team has specific issues that will be front and center. So we begin a look at the main questions each Pac-12 team will address this spring.Up next: Colorado. The Buffs, by the way, have already been at it in spring practice for over a week. Originally posted by ESPN.com - Pac-12 Blog Click here to view the article.