19 days and however many games into the season and last night saw MLBs first complete game, from the arm of Walker Buehler.
I have no idea if that is any sort of record for how long it took but because of the way the game is played and how starting pitchers are deployed the likelihood of it taking longer and longer to see a complete game is certainly real.
Despite leading the majors in starts last year and throwing over 200 innings, Buehler did not complete a game in 2021, and last night was just the 3rd CG (and first shutout) in his career. As durable and effective as he has been since becoming a regular in the LA rotation in 2018, I was a little surprised by that.