1. Robert Mathis
2. Bjoern Werner
3. Jonathan Newsome
4. Daniel Adongo
At 33 years old, Robert Mathis had the best season of his career in 2013, racking up 19.5 sacks and eight forced fumbles. However, the Colts need other options to rush the passer, as no one else had more than 5.5 sacks all year.
This will be an important season for Bjoern Werner, who wasn't as effective as a pass-rusher as the Colts were hoping he would be as a rookie, as he put up just 2.5 sacks. If he doesn't turn it around, rookie Jonathan Newsome will have a chance to get on the field to try to prove himself.
Meanwhile, the Daniel Adongo experiment will continue, as he'll likely make the final roster and play on special teams as he continues to develop into an NFL player.
1a. D'Qwell Jackson
1b. Jerrell Freeman
2a. Josh McNary
2b. Kelvin Sheppard
3a. Andrew Jackson
3b. Mario Harvey
4a. Scott Lutrus
4b. Henoc Muamba
There are currently a ton of inside linebackers on the roster, but don't expect them all to be there after training camp. The starters are pretty obvious with Jerrell Freeman and the newly acquired D'Qwell Jackson, the former veteran leader of the Cleveland Browns defense over the past few years.
The rest of the depth chart is pretty much up for grabs, as the rest of the linebackers will have to prove themselves over the next few months to secure their spots on the roster. Kelvin Sheppard was on the field often last year, but he was more of a liability than an asset when he played. Josh McNary didn't play a ton in his first year in Indy, but I felt that he made the most of his opportunities.
Rookie Andrew Jackson from Western Kentucky will have a chance to prove himself as well. He's a bulky player that isn't afraid to wrap up and make big tackles. He doesn't have top-end speed or instincts, but his build and strength could give him a chance to move up on the depth chart.
After that, Mario Harvey, Scott Lutrus and Henoc Muamba could all be cut if needed, but one or two of them should be able to stay on the final roster.
1. Erik Walden
2. Justin Hickman
3. Andy Studebaker
Erik Walden is still an overpaid player, but he wasn't as bad in 2013 as he was in 2012 with the Green Bay Packers. He still probably shouldn't be the long-term option to set the edge, and the Colts may consider replacing him through the draft in the next year or two.
As far as Walden's backups go, Justin Hickman and Andy Studebaker will be competing to be the No. 2 guy on the outside, and right now it's probably up for grabs.