From Florida State’s veteran line to Clemson’s fearsome defensive front, the ACC projects to have some of the country’s best position groups this fall, while a few other contenders will enter 2014 with some major question marks in key areas. With that in mind, we’re looking at the ACC’s best units, a few more that might surprise in 2014 and the top teams with holes that could keep them from an ACC title.

Previous installments of this series can be found here.

Up today: Linebackers

Best of the best: Clemson

It's easy to see why many believe the Tigers have the best front seven in the ACC. In addition to having the strongest defensive front, they also have the strongest group of linebackers returning to the team. Stephone Anthony had a breakout season a year ago, finishing with 131 tackles, 13.5 tackles for loss and four sacks in 802 snaps played. He should be a preseason All-ACC selection. Clemson did lose two starters in Quandon Christian and Spencer Shuey, but it returns experienced players at the position. Tony Steward and Ben Boulware will anchor the weak side. Both were ranked among the top linebackers out of high school, and if Steward can stay healthy, he is in line for a big year. At the other spot, Clemson has the option of playing a linebacker or nickelback depending on the alignment. T.J. Burrell and Dorian O'Daniel will be in the mix on the strong side.

Next up: Duke

The Blue Devils return the best linebacker duo in the ACC in David Helton and Kelby Brown, who finished as the top two tacklers in the conference last season. The two combined for 247 tackles a year ago and are back to anchor a group looking to improve both against the run and the pass. Their backups return as well, so there are not many depth concerns here. These two are as dependable as they come. Now, having said that, we would be remiss if we failed to mention Florida State. The Seminoles are losing two key players in Christian Jones and Telvin Smith and will be relying more on a five defensive back alignment, so there are some questions at the position. But this team has the talent to again be the best in the ACC once it gains some experience. As it stands now, Terrance Smith is the only linebacker with consistent playing time. Guys like Matthew Thomas and Reggie Northrup could develop into studs before the season's up.

Sleeper: Syracuse

The Orange return two of the more underrated linebackers in the ACC in Dyshawn Davis and Cam Lynch, who will be relied upon to anchor a defense with some serious questions on the defensive line. Though middle linebacker Marquis Spruill is gone, Syracuse coaches were pleased with the role Marqez Hodge played as a true freshman behind Spruill a year ago, so he spent a year in training preparing to take over the starting job. Davis and Lynch will be there to help Hodge along. Keep an eye on Louisville here as well. The Cards return hard hitter James Burgess and have moved Lorenzo Mauldin to outside linebacker/rush end. That should pay dividends.

Problem for a contender: Pitt

The Panthers have not gotten consistent linebacker play for years, so this position remains a question mark. Anthony Gonzalez and Todd Thomas return, but the Panthers have little in the way of depth to help them out. Thomas has the potential to be excellent. He had 72 tackles a year ago, but coaches are now hoping for more. Bam Bradley could also have an impact here, but only six lettermen are back from a year ago. There are also questions elsewhere in the conference. Will anybody step up to help out Denzel Perryman at Miami? And will Virginia Tech be just as good at linebacker without Jack Tyler and Tariq Edwards?