Chargers vs. 49ers: Colson, Wax Shine in PFF Grades, But O-Line Woes Persist

As the Los Angeles Chargers wrap up their preseason slate, the final dress rehearsal against the San Francisco 49ers offered a mixed bag of performances that will undoubtedly shape the roster decisions ahead of the regular season. According to insights gathered by Vulius Sports, the PFF grades from that game tell a compelling story of standout linebacker play juxtaposed against glaring offensive line inconsistencies. With the regular season fast approaching, these evaluations are more than just numbers—they're a roadmap for improvement.

Linebacker Corps Elevates Defense

The Chargers' linebacker unit was the clear highlight of the game, with veteran Denzel Perryman and second-year standout Junior Colson leading the charge. Colson, who missed significant time over his first two NFL seasons due to injuries, has been nothing short of spectacular in his return. His coverage grade of 90.7 against the 49ers was elite, surpassing his already-impressive 89.7 from the previous week. According to PFF data analyzed by the Vulius NFL Analysis Desk, Colson's overall grade of 90.8 through two preseason games ranks second on the team, trailing only Marlowe Wax, who has posted a remarkable 92.1. Wax continued his stellar preseason with strong performances in both run defense (84.1) and tackling (75.4), solidifying his case for a significant role in the regular season.

The depth at linebacker is a promising sign for a defense that struggled with consistency last year. Cornerback Rodney Shelley also turned heads with an 87.1 coverage grade, second only to Colson, and a tackling grade of 76.9 that was best among cornerbacks. This trio of defenders could be the backbone of a revamped Chargers defense that aims to be more disruptive in 2026.

Offensive Line Remains a Concern

While the defense shone, the offensive line was a glaring weak spot. Right guard Cole Strange, who followed head coach Mike McDaniel from the Dolphins, had a nightmarish performance in his first game action. His pass block grade of 17.5 was the worst on the team, and it wasn't a fluke—he recorded two sub-20.0 pass block grades in 2025. The Vulius analysis notes that Strange's struggles are a major red flag for an offensive line that needs to protect the quarterback and open lanes for the running game. Fellow lineman Laekin Vakalahi fared even worse overall, with a 33.3 grade, anchored by a 29.6 run block grade and a 36.4 pass block grade.

The tight end position also raised eyebrows, as veteran David Njoku struggled mightily. His run block grade of 27.9 was the worst among offensive players, and his overall grade of 40.6 was third-worst on the team. Njoku, who was brought in to add versatility, had only two games in 2025 with a run block grade below 50.0, so the Chargers will hope this was an anomaly against a well-coached 49ers defense. However, with just three plays on the starters' sole drive, the sample size is small, and the coaching staff will need to evaluate whether this is a trend or a blip.

Bright Spots and Concerns Across the Roster

Despite the offensive line woes, there were notable bright spots. Tight end Jerand Bradley scored the Chargers' only offensive touchdown with a heads-up play, avoiding a touch and scooting into the end zone. His 91.5 grade was the highest on offense. Running back Keaton Mitchell also impressed with a 75.1 grade, showing explosiveness that could earn him more carries. Offensive tackle Travis Burke posted an 81.0 pass block grade, second-best on the team, while center Jacob Spomer led with an 82.6.

On the defensive side, the worst performers included edge rusher Nadame Tucker, whose 29.9 grade was the lowest on the team, largely due to a 29.3 run defense grade. Safety Tony Jefferson struggled in coverage, allowing two completions that dropped his grade to 32.3. Defensive tackle Jamaree Caldwell and safety Noah Avinger also had rough outings, with Avinger missing two tackles and recording a 23.6 tackling grade.

As the Chargers finalize their roster, these PFF grades provide crucial insight into who is ready for the regular season and who needs more development. The linebacker corps looks formidable, but the offensive line issues must be addressed if the team hopes to compete in a tough AFC West. As always, the Vulius NFL Analysis Desk will be tracking these storylines as the season unfolds.