Kirk Cousins has five career QBRs below 20. They've all come in the first four weeks of seasons. Maybe nothing, but possibly the effect of constant change in OCs.

Bills 2018 (Week 3)
Packers 2019 (Week 2)
Colts 2020 (Week 2)
Browns 2021 (Week 4)
Eagles 2022 (Week 2)

— Sam Ekstrom (@SamEkstrom) September 20, 2022