More than a little disrespect from a TD mod??? "Had no upside"????
From Baseball Reference: He impressed in spring training in 2019 and started a dizzying ride to the majors, first posting a minute 0.40 ERA in 4 starts for the Fort Myers Miracle in the Florida State League, followed by going 4-2, 2.57 in 11 games in AA with the Pensacola Blue Wahoos, and then 5-2, 2.15 in 9 games for the Rochester Red Wings in the International League. His record between the three stops was 12-4, 2.07 with a 109/28 K/W ratio. The Twins, who were leading the AL Central division largely on the strength of their bats at that point, decided to ignore his less than stellar pedigree and give him a shot, since no one at any level had been able to figure out his pitches until then. In 9 games for the Twins, including 5 starts, he went 2-1, 1.59, and continued his mastery of the strike zone, with 23 strikeouts and 5 walks in 28 1/3 innings.
I recall he added a pitch in ST in '20 or '21 striking out nearly a batter per inning. I think it was a "splinker", but not sure. I also suspect it responsible for the hand problems he has suffered. I hope to have the opportunity to ask him in a month. He's always been a class act, accessible and fan-friendly. He most certainly has pitching upside and can contribute to the Twins at the MLB level again.
Also..... Mark's article reports Paddock "appeared to have worked in an adequate slider to pair with his fastball and changeup" upon joining the Twins. Seems "adding new pitches" comes with a risk.