College football coaches love competition, and spring practice serves as a proving ground for it. Starting jobs are usually not awarded until the summer, but players can separate themselves during spring ball. We'll know a lot more about several Big Ten teams following the 15 practices this spring.
Here are five position battles to watch when the teams return to the field:
1. Penn State quarterback: Record-setting signal caller Daryll Clark departs after two years as the starter, and Penn State's ability to find a capable replacement will determine the course for its season. Sophomore Kevin Newsome backed up Clark last season and enters the spring as a slight frontrunner, but Matt McGloin and early enrollee Paul Jones will challenge him. Heralded quarterback recruit Robert Bolden joins the mix this summer.
2. Iowa running back: Can a team ever have too many running backs? Iowa will let us know this year. Adam Robinson and Brandon Wegher stepped up big time in 2009, but they'll have to hold off Jewel Hampton, who returns from a knee injury that cost him all of last season. Don't forget Hampton had been pegged as Shonn Greene's successor before his injury. Jeff Brinson also returns from an ankle injury, and several others also will compete for carries.
3. Purdue quarterback: Robert Marve hasn't played a meaningful down since November 2008, but the Miami transfer hopes to succeed Joey Elliott as Purdue's top quarterback. Marve tore his ACL last summer and could be a bit rusty on the practice field, but he certainly boasts the talent to lead Purdue. He will compete with Caleb TerBush, who backed up Elliott last year but appeared in only one game, completing 4 of 10 pass attempts for 22 yards.
4. Illinois quarterback: The Illini have a new offensive coordinator and several new faces at quarterback following the departure of four-year starter Juice Williams. Paul Petrino wants to be very multiple with his scheme, but he needs to see who emerges between Jacob Charest, Nathan Scheelhaase, Eddie McGee and early enrollee Chandler Whitmer. Charest started two games in place of Williams late last season, while McGee has extensive field time but played wide receiver for part of 2009.
5. Michigan defense: You can't list only one position with the Wolverines defense, and all the individual competitions will be critical. Aside from a handful of likely starters -- defensive back Troy Woolfolk, defensive tackles Mike Martin and Ryan Van Bergen -- the competition will be open. Michigan needs consistent contributors who can work in Greg Robinson's scheme, and the coaches won't be afraid to look to young players.