Dak has finished ranked in the top 10 for accuracy and amount of tight window throws the past 3 years in a row, with Dak coming out #1 after the 2017 season based on completion rate, passer rating & adjusted yards per attempt.
Also, based on Approximate Value on all starting QBs for the past 3 seasons, Dak finished tied for 4th best with Seattle's Russell Wilson.
Approximate Value
To start his career Prescott has captained a Cowboys team that has won 32 games in three seasons, a win-rate of 66 percent. He has started in 48 career games boasting a record of 32-16, and achieved Pro Bowl status in 2016 and 2018 respectively.
According to Pro-Football-References’
Approximate Value, which places a value on each player for each season across all periods of the NFL, Prescott is one of the top ranked quarterbacks in terms of AV since entering the league in 2016.
Prescott is tied with Russell Wilson over the last three seasons. In that same span he has 14 game winning drives and 8 fourth quarter comebacks. There is no denying Prescott’s impact on the team, and he has been a crucial factor in the Cowboys’ recent string of success.
This off-season Prescott is expected to become the one of the highest-paid players in the NFL. Most would argue about why this is a bad idea, but there is evidence that suggests he is worthy of a massive contract, especially considering value at the quarterback position.
https://cowboyswire.usatoday.com/20...-dak-prescott-2019-nfl-season-advanced-stats/
Dak also finished as one of the best and most accurate "deep ball" passers his rookie season:
“Dak Prescott was one of the best deep ball passers in tight windows. A whopping 39.5 percent of Dak Prescott’s passes that traveled further than 20 yards in the air went into tight coverage. The rookie’s 29.4 percent completion rate was the ninth-best mark on such throws and he never recorded an interception.” –
Matt Harmon, NFL.com
Now, based on deep ball passing accuracy consisting of both tight coverage and open coverage, Dak finished his sophomore year with a 42.7 completion percentage on deep passes thrown completions %. That was bested this last season, his third year in the league, in 2018 with a completion percentage of 45%.
Just wanted to add these extra stats and viables to show how good Dak has been on various topics concerning his passing and concerns critics have had about him over the last 3 years. As you can see, Dak is ranked very highly on various measured statistics that prove he is worth keeping and paying in Dallas. He's only going to keep getting better.