Lol, those are literally the best relievers in the game. Finnegan isnt them.
Meanwhile, Jake McGee, Jeurys Familia, Joe Kelley, Alex Colome, Bryan Shaw, Trevor May, Jake Diekman, Matt Barnes, and Will Smith were all once good and fell off a cliff.
Relief pitcher is the most volatile postion in baseball, if not all of sports. Guys flame out all the time. Four years ago, Kirby Yates, Seth Lugo, Brandon Workman, Felipe Vazquez, Arolids Chapman, Nick Anderson, Hansel Robles, and Ken Giles were in the top 10 best relievers. Yea .... hows that working out now?
Someone is offering you a top 30 prospect in their system for Finnegan, you absolutely take it. Then you call up someone and see if they have the goods. Thats what developmental teams do.