Mailbag: What will be Luck's stat leap?

Mike Wells: Completion percentage. Andrew Luck jumped from 54.1 percent as a rookie to 60.2 percent last season when he didn't have his security blanket - Reggie Wayne - to turn to in the final nine weeks of the season. There were times you wondered who Luck would be throwing the ball to outside of T.Y. Hilton and Coby Fleener after Wayne went down with his torn ACL. Now, barring injuries, Luck will have plenty of options to throw the ball to, which is why I think he'll continue to improve his completion percentage.

Wells: There are two formations that I think you'll see quite a bit with offensive Pep Hamilton. Two-tight end sets with Dwayne Allen and Fleener. You didn't see that as much last season because Allen barely played half of a game. And you'll definitely see a lot of three-wideout formations with Wayne, Hakeem Nicks and Hilton. I'm also looking forward to when they spread the field with three WRs and two TEs. They used that formation in a red zone drill in practice Monday. That's a matchup nightmare for opposing defenses.

Wells: Receiver Da'Rick Rogers has gotten off to a slow start in training camp. I look at that as a disappointment because Rogers has all the talent to get the job done. He's just not showing it. Rogers did catch a touchdown pass Monday. That's good. The bad part is I turned to a fellow media member and mentioned that was the first time I had seen Rogers do something impressive in practice. Griff Whalen has definitely outplayed Rogers so far in camp.

Wells: Herron is going to get a chance to be the Colts' third running back after Chris Rainey's immaturity cost him a shot at making the team. One of the keys for Herron is staying healthy. He was placed on injured reserve last December. You can expect the Colts to continue to bring in running backs throughout training camp until somebody shows they're ready to be the third back behind Trent Richardson and Ahmad Bradshaw.

Wells: Landry will be the Colts' starting safety as long as he remains healthy. General manager Ryan Grigson did not give Landry a four-year, $24 million contract to be a backup safety for them.

Wells: You know what you're going to get from tackles Anthony Castonzo and Gosder Cherilus. It's the interior part of the offensive line that's a work in progress. The first-team guards so far have been Hugh Thornton and Donald Thomas. Khaled Holmes is obviously the starting center. Rookie Jack Mewhort is also getting some snaps with the first unit at guard when Thomas isn't in there.

Wells: That's an intriguing battle. Landry will be one of the starters and Delano Howell seems to have the edge on veteran Mike Adams so far. Part of it could be because Adams didn't join the team until the middle of June. The other part is Howell is stepping up to the challenge because he knows he has a player with more experience breathing down his neck for that spot.

Wells: This is no knock on Holmes because he could turn out to be an exceptional player, but I have to say center at this point simply because Holmes lacks experience. Twelve snaps goes under the category of inexperience. I've heard mostly good things about Holmes in camp so far, so that's a step in a right direction for him and the Colts.

Wells: The Colts will run the ball because they want to have as much of a balanced offense as possible, but I don't think you'll hear them talk about a power-running game as much as last season. They simply want to put points on the scoreboard whichever way necessary. With that said, and the weapons they have on the outside, Luck will have plenty of opportunities to throw the ball.

Wells: Tackles: Castonzo, Cherilus. Guard: Thornton, Thomas. Center: Holmes

Wells: Mewhort. You knew the rookie out of Ohio State was somebody the Colts held in high regard when they placed his locker next to Luck's at the team's practice facility. Then Mewhort was working with the first during offseason workouts and now he's continuing to impress the team and outsiders. I had a lengthy conversation with former Colts center and current ESPN NFL analyst Jeff Saturday after practice Monday about the overview of the team and he mentioned Mewhort's names on multiple occasions. Saturday is impressed with the toughness Mewhort has brought so far and his knowledge of the game.

Wells: That's a tough one because I believe both players are going to have good seasons. But since I'm being forced to pick one, I'll go with Hilton because I think he's going to have a lot of big plays down the field with teams being worried about Nicks and Wayne. I expect Hilton to seize the moment.

Wells: Wayne has been impressive in camp because of what he's overcome - the torn ACL - to get back on the field, but Bjoern Werner has basically cemented the starting outside linebacker spot during Robert Mathis' absence after just one week of training camp. Here's what Luck had to say about him. "He's savvy. He's got a great athletic sense. You see him dropping back into coverage and he covers a lot of ground. He's a big body and he has great ball instincts. I can't speak to his pass rush, I'm not a tackle, but his athleticism. He's the type of teammate you want."