bb-ref told us never to compare players within one or two WAR wins -- so that stat is too close to call for Tiant and McLain in '68 (fWAR is even closer). So... the MVP or the ERA leader? The world champ who led the league in 9 pitching categories and was second in 7 others, or the third-place ace who led in 12 categories? McLain is the only 31-game winner in the past 90+ years, but Tiant won 21 and posted a great 1.60 ERA… though only about one-third of a run better than Denny’s 1.96.
I give the edge to McLain for his league-leading Innings Pitched: 336… which was 78 more than Tiant's. That's basically 9 more complete games, which Denny also led in, with Luis second -- 28 to 19. Some may argue McLain pitched for a great team… but others may counter that a great pitcher can make a good team great. Otherwise, why has the world of baseball credited Ws for over a century to the only player – in the center of the diamond -- who touches the ball and initiates every play while he’s in the game?
Agreed with the choice of Clemens in '90, a great pitcher who made a good team finish first. I'd also argue Dave Stewart and Eck were better than Welch on the A's alone that year.
The connection to discussions about the '24 Red Sox all winter is that a great pitcher (not necessarily one with a great W-L past) can make any team better, even a doormat. And one guy can boost a mediocre team to a postseason. We just need to find one: buy one, take one, make one...