Strong Safety: Marcus Gilchrist vs. Jahleel Addae
In just his second year with the Bolts, Addae is ready to legitimately compete for a starting job in 2014. He and Gilchrist will make for a very intriguing matchup during training camp, and fans should feel pleased with either outcome.
Gilchrist has notched 46 regular-season games and two playoff appearances in four seasons. He finished third in tackles last year with 77, had five pass breakups and pocketed two interceptions.
Addae's resume, though brief, is also favorable. As an undrafted free agent in 2013, he worked his way up the depth chart the hard way, making plays on special teams before defensive coordinator John Pagano began working him on defense. He made 38 tackles, deflected three passes and recorded a sack his rookie year.
Defensive Tackle: Sean Lissemore vs. Ryan Carrethers
Pagano used Lissemore and former Charger Cam Thomas in a rotation last season, though Thomas was the real breadwinner of the two with 10 of the 16 starts in the regular season. Lissemore played well his first year in Pagano's system, garnering 24 tackles, two sacks and a pick-six of Washington's Robert Griffin III.
Lissemore could have improved upon those numbers, but a shoulder injury sidelined him for the postseason. With Thomas now in Pittsburgh, Lissemore has a real shot at starting more games in his second year, but a rookie could be standing in his way come training camp.
Carrethers, San Diego's fifth-round draft choice, has a true nose tackle build at 330 pounds and is the better fit from a scheme perspective. His large body would command more double-teams and allow linebackers to be more effective in stopping the run at the line of scrimmage.
Both are expected to see the field this season, but which of the two separates himself in camp and grabs hold of that starting role?
Right Guard: Jeromey Clary vs. Johnnie Troutman/Rich Ohrnberger/Chris Watt
With Clary still rehabbing multiple offseason surgeries, Troutman, Ohrnberger and Watt have had their fair share of reps at right guard with the first unit, according to ESPN.com's Eric D. Williams. Clary's status for training camp is still uncertain at this point, so it's a real possibility the starter emerges from the healthy trio.
Troutman's performance at right guard last season was certainly not his best, though his efforts at left were. Ohrnberger made one start at right guard in 2013, but his heroics at center in place of injured starter Nick Hardwick during the postseason was his most acknowledged accomplishment. Last but certainly not least is San Diego's third-round pick in Watt, who was a three-year starter at Notre Dame.
No. 2 Receiver: Malcom Floyd vs. Vincent Brown
Keenan Allen's first year was enough to solidify his standing as a starter for the upcoming season, but where will the Chargers go with their second wideout slot?
Brown made 12 starts alongside Allen in 2013, but his production wasn't up to par. He was given a grand opportunity to come back from a lost year in 2012, but 41 catches for 472 yards and a touchdown weren't the numbers expected from him. He'll now have to fend off returning veteran Malcom Floyd.
A season-ending neck injury in Week 2 forced Floyd to consider an early retirement for the sake of his long-term health, but doctors officially gave him the thumbs up to resume training in the offseason. He and Philip Rivers have a history of hooking up for big plays, so it's safe to assume he'll be in the running for a starting role.