All years are categorized by the season in which the player was first available for selection by the Union, i.e. a signing in the offseason after the 2019 campaign would be categorized as "2020."

Season
2014
2016
2017
2018
2019
2020
2021
SuperDraft
Andre Blake
Jack Elliott
Homegrown
Anthony Fontana, Matt Real
Matt Freese
Jack de Vries, Cole Turner
Paxten Aaronson, Brandan Craig, Nathan Harriel, Jack McGlynn, Quinn Sullivan
Trade
Joe Bendik
Signing (Discovery, Free Agent, etc.)
Alejandro Bedoya, Ilsinho
Cory Burke, Olivier Mbaizo, Kacper Przybylko
Aurelien Collin, Jamiro Monteiro, Sergio Santos, Kai Wagner
Jakob Glesnes, Matej Oravec, Jose "El Brujo" Martinez
Stuart Findlay, Leon Flach, Greg Ranjitsingh