With spring practice underway at many Pac-12 destinations, it's time to do our annual position-by-position breakdown.

We'll finish up the offense with a look a the offensive lines. The North came earlier, and now to the South:

Arizona: The biggest loss is center Steven Gurrola, a second-team All-Pac-12 selection, but the Wildcats also have to account for the departures of four-year starting tackles Fabbians Ebbele and Mickey Baucus. Freddie Tagaloa, a former starter at Cal, is a good candidate to start at either tackle spot. Cayman Bundage probably will get the first crack at center, while Jacob Alsadek, Jordan Poland, Zach Hemmila, T.D. Gross and Lene Maiava are all fighting for time across the line.

Arizona State: Tackles Jamil Douglas and Tyler Sulka are gone, but the Sun Devils have the middle of the line returning with LG Christian Westerman, center Nick Kelly and RG Vi Teofilo (Teofilo’s status could be in question due to injury). Evan Goodman, Sam Jones and Quinn Bailey are three names to watch at tackle.

Colorado: The Buffs need to replace guards Kaiwi Crabb and Daniel Munyer, but return three starters in center Alex Kelly, LT Jeromy Irwin and RT Stephane Nembot. A foursome of Sully Wiefels, Auburn transfer Shane Callahan, Gerrad Kough and Jonathan Huckins figures to make up the group competing for the vacant jobs.

UCLA: Offensive line is clearly listed under strength for the Bruins. In bold. They return all five starters – LT Conor McDermott, LG Alex Redmond, C Jake Brendel, RG Caleb Benenoch, RT Simon Goines – and have good depth as well. Brett Hundley was one of the country’s most sacked QBs during his tenure, but those issues regressed as last season went along.

<USC: Bob Connelly replaces Tim Drevno as the position coach, but every starter from last year’s talented unit returns. Center Max Tuerk, a national honors candidate, is a lock to return at center, but there are six players conceivably in contention for the other four spots. Chad Wheeler and Zach Banner project at left and right tackle, but Toa Lobendahn showed he could played tackle too after Wheeler went down with a torn ACL for the final five games. It will likely come down to Damien Mama and Viane Talamaivao battling at right guard, but Khaliel Rodgers could potentially factor in as well.

Utah: LT Jeremiah Poutasi’s early departure for the NFL draft was somewhat unexpected, but the Utes are still in a good spot from an overall talent perspective, although still very fluid. J.J. Dielman is the likely candidate to wind up in Poutasi’s spot, a switch from right tackle, while Siaosi Aiono returns at center. Isaac Asiata is a versatile player who could play guard or tackle, while Salesi Uhatafe should be in line for a bigger role next year as well. Several players, including Hiva Lutui and Jackson Barton, will compete at right tackle.