Who should win the NL Cy Young Award? Ranking the top 4 candidates in tight race
For as difficult as it was to pick the National League MVP, picking who should win the Cy Young Award from the senior circuit may actually be the hardest honor to decide on in 2021.
With NL MVP, we created one metric that totaled the most important statistics and whoever had the highest number was the most deserving. With pitching it's not that simple. In some cases, you want to have the highest number of a given statistic as a pitcher, but there are other numbers where the most dominant pitcher will turn in the lowest mark. So we created two different numbers as guides, the first of which lowest is the best, and the second of which highest is the best.
Cy Young Formula 1 (lowest is best): ERA + FIP + SIERA
Cy Young Formula 2 (highest is best): Innings pitched (rounded down if 1/3, rounded up if 2/3 of an inning) + strikeouts + complete games + fWAR + bWAR

Again, neither of these outcomes was used solely to decide the order in a race with four legitimate competitors. The perfect pitcher would be the most dominant and lead the league in innings pitched, but that's not how things played out in 2021. So ultimately, you have to decide how to balance peak performance with total workload.
As with all individual awards, team success -- or lack thereof -- was not a consideration. Neither was whether a player spent the entire season with one team or was traded during the season.
With all that acknowledged, here's how our NL Cy Young Award ballot would look: