INF Zack Short
On the surface, Short is the most surprising player still left over from the previous regime. He barely played in the majors last season and just doesn't seem to have it. But when you remember Scott Harris' motto of dominating the strike zone, it makes more sense.
One of Short's strengths is the ability to draw a walk. He had a 15.7% walk rate in Triple-A last year, and a 12% walk rate with the Tigers in 2021. The problem is that he also strikes out a lot. But Harris can certainly appreciate the strong plate discipline.
Harris and Short also have a history together from their time with the Cubs. Harris worked in the Cubs' front office under Theo Epstein from 2012-19, so there's some familiarity there. Short was traded to the Tigers in 2020 for Cameron Maybin.
With all the being said, it's hard to see him surviving this season. He turns 28 in May, and unless he suddenly cuts down on the strikeouts and/or starts making more consistent contact, he probably gets DFA'd at some point this season. There are younger players with more potential that are more deserving of his roster spot.