Pac-12: Sione Sina

Our look at position groups in the Pac-12 continues.

Arizona: Coach Rich Rodriguez is confident in both Reggie Gilbert and Dan Pettinato and anxious to get junior-college transfers Jeff Worthy, who also spent a year at Boise State, and Jerod Cody acclimated to the system. Calvin Allen, Jack Banda and Luca Bruno are coming off redshirt seasons and represent a group Rodriguez said the team needs production from.

Arizona State: With the departure of Gannon Conway and Davon Coleman, there is a question about the team's depth at end. Without Will Sutton clogging things up next year, the Sun Devils' lack of experience is even more of a concern. Sean O'Grady backed up Conway and Coleman last year, but ASU has several well-regarded junior-college transfers in Edmond Boateng, Marcus Hardison and Demetrius Cherry.

California: The Bears list seven defensive ends, but former junior-college transfer Kyle Kragen and Puka Lopa gained the most experience last season listed at the rush position. Antione Davis was outgoing starter Dan Camporeale's primary backup, but Brennan Scarlett's return is more important. He started nine games in 2012 and has been cleared to play following a hand issue that cost him the 2013 season. Todd Barr, Sione Sina and recent-transfer Jonathan Johnson are also in the mix.

Colorado: Colorado must replace Chidera Uzo-Diribe, but Juda Parker is back for his senior season, and several others have game experience. Samson Kafovalu is the likely candidate to start opposite him after making 18 tackles in seven games last year. Jimmie Gilbert was Uzo-Diribe's backup, Kirk Poston and De'Jon Wilson also played.

Oregon: The Ducks took a hit with the departure of Taylor Hart, who was named second-team All-Pac-12, but have a talented player in Arik Armstead lined up to take his spot. Armstead started five times in 2013 and left the basketball team midseason to shift his focus back to football. T.J. Daniel, Jason Sloan are projected to be in the mix for playing time.

Oregon State: Scott Crichton is gone, but Dylan Wynn remains and will likely be the Beavers' best defensive player a year after finishing fourth on the team in tackles. Lavonte Barnett, Crichton's primary backup in 2013, and Jaswha James figure to compete for the starting job, but there are two others to keep an eye on. Obum Gwacham recently switched from receiver and Mike Riley has been complimentary of Titus Failauga, who is coming off his redshirt.

Stanford: Henry Anderson has a chance to be one of the best defensive players in the conference and Blake Lueders, who switched from OLB, began the spring atop the depth chart. The intriguing prospect is Luke Kaumatule, who was recruited to play defense but began 2013 as the team's starting tight end. Spring will be important for his development, but his raw ability is impressive.

UCLA: Both Ellis McCarthy and Eddie Vanderdoes were all-Pac-12 honorable mention last season and highlight a talented UCLA defensive line. Their return will help account for the loss of Cassius Marsh, who started 12 games last year. Both McCarthy and Vanderdoes can play inside or outside, but the Bruins listed them both at end. Highly recruited DE Kylie Fitts saw playing time as a true freshman last season.

USC: Leonard Williams, the only sophomore named first-team all-Pac-12 on defense last season, is the best in the conference. Delvon Simmons, who sat out last season after transferring from Texas Tech, has a lot of game experience. He started 12 games for the Red Raiders in 2012 and had regular playing time as a freshman there in 2011. Both Simmons and J.R. Tavai, who was an all-Pac-12 honorable mention selection, can play inside or outside.

Utah: There's no replacing Trevor Reilly, who made 100 tackles despite lingering effects from a torn ACL, but Nate Orchard and Hunter Dimick both saw extensive playing time last season. The Utes have five other defensive ends on the roster, but of that group only LT Filiaga made a tackle last season.

Washington: The Huskies are in great shape with the return of Hau'oli Kikaha, a second-team All-Pac-12 selection, Cory Littleton and Evan Hudson. Josh Shirley has 10 career starts, while Joe Mathis and Psalm Wooching provide depth.

Washington State: With Toni Pole expected to move back inside, the depth chart will look similar to how it did going into last season, minus Matt Bock. After making 50 tackles last year, Xavier Cooper will start on one side, with Destiny Vaeao and Lyman Faoliu strong candidates for more playing time. Emmitt Su'a-Kalio is coming off a redshirt, and the Cougars also signed a pair of defensive ends from Hawaii in Kingston Fernandez and Hercules Mata'afa.

Previous positions

Tight end
Quarterback
Running back
Receiver
Offensive line
Defensive tackle
Continuing with the hits and misses from Pac-12 recruiting.

CALIFORNIA

Needs filled: The Bears added nice depth to the offensive line with tackles Aaron Cochran and Erik Bunte. Junior-college transfer Sione Sina can also be a nice stopgap at defensive end. They went heavy in the trenches with five offensive linemen and seven defensive linemen.

Holes remaining: Cal is looking for a quarterback to run the new-look offense under new head coach Sonny Dykes. Could be Zach Kline of the 2012 recruiting class. Could be Jared Goff of this year's class, an early enrollee. The Bears addressed a lot of positions, but whether some youngsters can step up remains to be seen. The 11th-hour flip of offensive guard Cameron Hunt to Oregon has to sting.

OREGON

Needs filled: The Ducks went heavy on offense, and running back Thomas Tyner highlights a group that is loaded with speed (what did you expect, it's Oregon). They added two stellar offensive guards in Hunt and Evan Voeller and a premier defensive end in Torrodney Prevot, previously a USC commit. There are speedy receivers down the line like Darren Carrington. And they added kicker Matt Wogan. The Ducks were 11th in the conference in field goals made in 2012.

Holes remaining: The Ducks still have holes to fill at linebacker. Junior-college transfer Joe Walker, an outside linebacker, could step in to help immediately. But with the losses of inside linebackers Michael Clay and Kiko Alonso, the Ducks have mostly untested talent at the position and this year's class didn't add much depth to a position that is already a question mark.

OREGON STATE

Needs filled: When you look at the top two players the Beavers lost -- Jordan Poyer and Markus Wheaton -- it's nice to look at their recruiting class and see a cornerback and wide receiver as the two highest-rated players. Dashon Hunt and Hunter Jarmon might never develop into a Poyer or a Wheaton, but the Beavers saw the holes and addressed them. JC defensive tackles Kyle Peko and Edwin Delva should help immediately and Kyle Kempt could develop into the quarterback of the future in a couple of years. a href="http://espn.go.com/college-sports/football/recruiting/player/_/id/136903/jordan-villamin">Jordan Villamin, 6-foot-4 wide receiver, might also develop into a nice red zone target.

Holes remaining: The JC transfers help with the defensive line in the immediate future, but the Beavers signed only two high school defensive linemen, leaving some questions about depth in the future. It's likely a position they'll address heavily next season.

STANFORD

Needs filled: This is a class low on numbers, but extremely high on potential. If quarterback Ryan Burns is as advertised, it's possible he could challenge for the starting job as early as 2014. Francis Owusu has tremendous upside as a receiver and Peter Kalambayi adds depth to one of the best front sevens in the nation. Plus, three tight ends (Austin Hooper, Greg Taboada and Eric Cotton Jr.). How very Stanfordish of them.

Holes remaining: The Cardinal loaded up on defensive linemen with five last year and there is plenty of depth, albeit untested, at running back. The Cardinal didn't sign any running backs or defensive linemen this year. It's not a bad thing -- for now. But if a couple of guys get injured or if there is any attrition, it could bite them. For now, the Cardinal seem to be in good shape across all positions.

WASHINGTON

Needs filled: The Huskies added some much-needed depth on the defensive line with five linemen -- headlined by ESPN 150 defensive tackle Elijah Qualls. Damore'ea Stringfellow and Darrell Daniels -- both ESPN 150 wide receivers -- provide a nice one-two offensive punch. Troy Williams, the nation's No. 3-rated dual-threat quarterback -- could potentially be the heir apparent to Keith Price. It was a good class that fills a lot of needs.

Holes remaining: For solid as the defensive line class was, the Huskies signed only three offensive linemen -- though one of them is Dane Crane, the nation's No. 4-rated center. If you recall, however, the Huskies were decimated with offensive line injuries this year and coach Steve Sarkisian made it a point to talk about the team needing more depth to be able to absorb that kind of injury hit. Three more guys helps; but is it enough to sustain them if another injury bug ravishes the line?

WASHINGTON STATE

Needs filled: This was quietly a very good encore recruiting class for Mike Leach in his second season at the helm. It's heavy on linemen, heavy in the secondary and it's headlined by a four-star wide receiver in Vince Mayle -- a JC transfer from Rocklin, Calif. Interestingly enough, it also has two fairly highly rated running backs. We know Leach isn't going to be a run-first guy -- but the Cougars could certainly use the help after rushing for 29.1 yards per game last season.

Holes remaining: Who is going to run the offense? It could be Connor Halliday. But it's also possible Leach pulls the trigger on Tyler Bruggman, the No. 22-rated pocket passer in the country from Phoenix. That remains the No. 1 priority for the Cougars in the offseason. Otherwise, this recruiting class plugged a lot of holes. The question is whether they are the right guys to help immediately.

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