There are great pitchers — Johan Santana arrived onto the scene, absolutely dominated over a short stretch of time, then was claimed by Father Time and Uncle Injury, fading from the league. There are Hall of Fame pitchers — Roy Halladay won a Cy Young in both the AL and NL, anchoring bad Blue Jays teams and excellent Phillies teams before the aging curve took its toll. And then there are unicorns.
Max Scherzer is a unicorn. He is 36, in his 14th major league season. He has thrown nearly 2500 major league innings. And if he was on the Yankees right now, he would be their best starter by ERA and K-BB%, and second behind Gerrit Cole in virtually every other metric.