Indiana defensive coordinator Doug Mallory is looking for a few good men this spring. Actually, more than a few.
Mallory isn't necessarily seeking the next standout player (although he wouldn't complain if he found one). The Hoosiers' defense has had productive individuals over the years, from cornerback Tracy Porter to defensive linemen Jammie Kirlew and Greg Middleton, to defensive tackle Adam Replogle. Last fall, Replogle put up huge numbers for an interior lineman (13.5 tackles for loss, five sacks, two forced fumbles, 71 total tackles). Safety Greg Heban (91 tackles, three interceptions, seven tackles for loss) and linebacker David Cooper (86 tackles, nine tackles for loss, three sacks) also had strong statistical seasons.
But the unit still struggled, finishing 103rd nationally in yards allowed, 101st in points allowed and 116th against the run. The cumulative results were all too typical for a defense that has struggled for more than a decade because of its lack of depth.
"It can't be the same guy out there every single play of the game, every play of the season," Mallory told ESPN.com. "We've got to be able to have some guys come in and contribute, whether it's 10, 20, 30 plays a game, guys who give us a little bit better depth."
The Hoosiers are looking for numbers this spring, at least 22 defenders who Mallory can feel confident about sending onto the field this coming season. IU's offense took a significant step in coach Kevin Wilson's second year and should be one of the Big Ten's most explosive units in 2013.
But for Indiana to take a step as a program -- toward winning records and bowl appearances -- its defensive depth must improve substantially. Although it's not ideal that three projected starters -- Cooper and fellow linebacker Chase Hoobler, and safety Mark Murphy -- are now sidelined this spring, it's more important to get others up to speed.
"We're trying to see more competition, more guys putting themselves in position to compete," Mallory said. "With all these guys coming back, that's great, but we were not very good a year ago, so that could be a positive and it could also be a negative. We've got to make major strides and do a better job as coaches and as players defending the run, stopping the run and being a lot more physical on defense."
Mallory has made it clear to the players that there are "no starters" this spring. Players move between the first-, second- and third-teams from practice to practice, depending on performance, and sometimes even within a single workout.
"The worse you are, the further you fall on that depth chart," Mallory said. "Kids understand that."
Mallory has been impressed by cornerback Kenny Mullen, who started the final five games in 2012. Defensive end Bobby Richardson, a reserve last fall, also has stood out as IU must replace two starters up front.
Help is on the way as Indiana significantly elevated its defensive recruiting efforts for the 2013 class. Six of IU's seven highest-rated recruits, according to RecruitingNation, will play defense, including ESPN 150 defensive back Rashard Fant, and linemen Darius Latham and David Kenney III.
"On paper, it definitely looks like a good class," Mallory said. "We're looking forward to getting those guys here, and they'll get in here and compete. You certainly want to be quality two-deep and hope that your incoming class are guys that can help you get three-deep."