The third year you are counting as good they were ranked 17th. Prescott has two lines out of ten that ranked lower than 17th. In other words, Prescott has had much better line support than Herbert over his career.
| 2016 | 1–2 | One of the greatest OLs of the decade. Tyron Smith, Zack Martin, Travis Frederick, Doug Free, Ronald Leary/La'el Collins powered Ezekiel Elliott's rushing title and Dak Prescott's stellar rookie year. |
| 2017 | 4–8 | Still excellent, though injuries and Ezekiel Elliott's suspension hurt the offense. |
| 2018 | 6–10 | Travis Frederick missed the entire season with Guillain-Barré syndrome, causing a noticeable drop. |
| 2019 | 2–5 | Frederick returned and the line rebounded behind Smith, Martin, Collins, and Frederick. |
| 2020 | 20–30 | Massive collapse due to injuries. Tyron Smith, La'el Collins, and Zack Martin all missed significant time. |
| 2021 | 8–12 | Improved, but no longer the dominant force of previous years. |
| 2022 | 4–8 | Tyler Smith emerged immediately at left tackle/guard while Zack Martin remained elite. |
| 2023 | 6–10 | Strong pass protection overall, though run blocking was less dominant than in the peak years. |
| 2024 | 15–22 | Transition year after Tyron Smith's departure. Rookie Tyler Guyton, Cooper Beebe, and injuries made the unit inconsistent. |
Overall eras
- 2016–2017: Elite, arguably the NFL's best offensive line.
- 2018–2019: Still among the league's top groups despite Frederick's illness in 2018.
- 2020: One of the biggest injury-driven declines in the NFL.
- 2021–2023: Good to very good, anchored by Zack Martin and the emergence of Tyler Smith.
- 2024: Middle-of-the-pack while rebuilding around younger players.
A rough average by era:
- 2016–2019: Top 5
- 2020: Bottom 5
- 2021–2023: Around Top 10
- 2024: Around 18th
The Cowboys' line during the Tyron Smith–Travis Frederick–Zack Martin era is still widely regarded as one of the NFL's best offensive line stretches of the past 20 years.