Running back Donald Brown: The Colts' top draft pick in 2009, Brown suffered through an injury-marred rookie season. When healthy, he displayed an ability to be a force as both a runner and as a receiver out of the backfield. While he needs to improve his pass blocking skills, the talent is obviously there. Brown will team with starter Joseph Addai this season.
Defensive tackle Fili Moala: While he didn't play much as a rookie last year, Moala is being counted on to provide additional depth in 2010. In fact, if he can show improvement in learning the team's defensive scheme from a year ago, Moala could very well push starters Daniel Muir and Antonio Johnson for increased playing time.
Cornerback Jacob Lacey: Lacey made the Colts' roster as an undrafted free agent last year. He emerged quickly as a valuable backup defensive back for Indianapolis due to injuries that sidelined starters Marlin Jackson and Kelvin Hayden. Lacey needs to improve the overall consistency of his play, but he showed enough ball-hawking skills as a rookie to warrant a longer look in 2010.
Hot seat: First-year offensive coordinator Clyde Christensen takes over from longtime veteran offensive coordinator Tom Moore, who is now the Colts' senior offensive assistant. This is Christensen's second stint at running an NFL offense -- he was in charge of Tampa Bay's offensive play-calling during the 2001 season under former Buccaneers and Colts head coach Tony Dungy. This is Christensen's chance to prove that he can be a very good NFL offensive coordinator. Of course, with the tools that he has to work with this time around (beginning with quarterback Peyton Manning), his job will be made that much easier.