That sounds about right but I'm guessing the APY will be closer to $38.5M but that's pulling strings. One thing I'm sure of, his APY floor is $37.7M ( amount of 2nd tag )
https://www.pff.com/news/nfl-2021-free-agency-top-100-free-agents
1. QB DAK PRESCOTT
The prize of the free agent market, Prescott went down with an unfortunate injury after just four-plus games in 2020. With four full seasons under his belt, Prescott has finished in the top 10 of PFF grades twice while ranking closer to 20th in the other two seasons. However, Prescott’s 85.2 PFF grade this season would’ve been a career-best, and his 2019 and 2020 work is the most productive of his career.
From a macro view, Prescott’s play dipped as his supporting cast took a step back, but a revamped receiving corps has had Dallas’ offense moving the ball efficiently with Prescott at the helm. With solid accuracy, decision-making and mobility, he has proven capable of putting up high-end production, and he appeared on his way to establishing himself as an annual “top-eight” quarterback prior to his injury.
Contract Analysis: A second franchise tag would be valued at $37.7 million for Prescott, so the two sides finally agree to a long-term extension just above that on an annual basis.
Prediction:
Cowboys sign Prescott for four years, $158 million ($39.5M APY): $115M total guaranteed, $75 million fully guaranteed at signing.