Debuts in relief for the Twins this year, before Dyson: Romo - scoreless inning Stashak - 2 scoreless innings Thorpe - 2.2 IP, 1 R (relief debut, after 5 IP, 2 R starting debut) Poppen - 4 IP, 3 R Eades - 2 scoreless innings Stewart - 4 scoreless innings (although he was a "primary pitcher" after an opener a few times last year) Smeltzer - 4.1 IP, 1 R (relief debut, after 6 IP, 0 R starting debut) Adams - 2 scoreless innings Morin - 2 IP, 1 R Parker - 1 IP, 1 R Harper - 1 scoreless inning I don't know if they count as implosions: Perez - 3.2 IP, 3 R (we were up 8-0 at the time) Romero - 2 IP, 3 R (we were up 15-4 at the time) The only previous "implosion" Twins relief debut this year would seem to be: De Jong - 1 IP, 4 R And of course, Adrianza's 3 runs in 1 IP. You're probably thinking of Andrew Vasquez too -- 3 runs without recording an out (just like Dyson!) in his lone 2019 appearance, although it wasn't his Twins pen debut -- he pitched for us a bit last year as well. If you count him, you probably also need to count Mejia (0.2 IP, 0 runs in 2019 debut, after 1 game in relief last year) and Littell (2 scoreless innings in 2019 debut, after a few games in relief last year). In any case, I guess Dyson's best Twins reliever debut performance comps are currently Vasquez, De Jong, and Adrianza. That's comforting.