Nobody mentioned it, so here it is.
He has one of the weirdest career arcs you'll ever see. Sucked for years, became legendary great for a few seasons between ages 28-30, and then sucked again.
Has the greatest 30 game pitching stretch in MLB history. In a 30-start stretch between 2015-16, he was 25-1 with two no-hitters, 1.13 ERA, .156 OBA, 0.76 WHIP and a Cy Young.