What happened: PFF defined the split as attempts traveling at least 20 yards downfield. His efficiency there contrasted with a 69.0 overall passing grade, his lowest since 2021.
Why it matters: Downfield efficiency offers a clear benchmark entering the 2026 season. It also adds performance context around Jackson's contract timing.
By the numbers: 132.4 passer rating on throws of 20-plus yards in 2025; 69.0 PFF passing grade overall.
What to watch: The next measure is whether Jackson sustains that deep-ball efficiency throughout 2026.