The way I see it, the problem here is that you continue to grade Maeda's 2020 season using only the most superficial stats and a gut feeling, while ignoring what he actually did to improve over past seasons. It has been widely written about and discussed that the Twins changed his approach to batters, particularly use of his changeup to opposite side hitters. But to dig into the stats... this is out of all qualifying pitchers in MLB last season: FIP - 10th K% - 8th BB% - 4th Combine the K/BB into K-BB% and Maeda comes in fourth in all of baseball, only behind literally the best pitchers in the game last season (in order: Bieber, deGrom, Bauer). Last season, Maeda improved on swing percentages in the zone and swing percentages outside the zone, while reducing contact (sometimes drastically) on those same swings. According to Fangraphs, every pitch type he threw last season with any regularity was positive value, which is pretty extraordinary and speaks to his control and command. Long story short, the Twins took Maeda's pitch combination and when/where to throw them, tweaked them pretty heavily, and as a direct result, Kenta improved in almost every measurable way over his previous career numbers. Is Maeda due to regress in 2021? I mean, probably... because almost all pitchers who pitch that well for a stretch are due to regress a bit. Will he regress to his career norms? Unlikely, because we can establish actual changes made and the corresponding improvement that went along with it. This wasn't a lucky season nor did he pitch over his head.