The New York Yankees and the Colorado Rockies have shared a lot of different players in recent years. DJ LeMahieu is the former Colorado Rockies player that has flourished the most in a Yankees uniform but the Yankees poached some former Rockies directly off the Rockies scrap heap and made them into good players (at least for a short period) or they grabbed them as a veteran in the twilight of their careers.
Since 2016, that list includes relievers Adam Ottavino, David Hale, Tommy Kahnle, catcher Chris Iannetta (in 2020 but he never played in a game with them), Chad Bettis (similar case to Iannetta), Mike Tauchman, Troy Tulowitzki, Matt Holliday, and Eric Young, Jr.
For the Rockies, former Yankees players that have been with the Rockies in that same time frame are Joe Harvey, Philip Diehl, James Pazos, Chad Qualls, Boone Logan, Matt Holliday (was a Rockie for a second stint after playing with the Yankees) and Jhoulys Chacín (who was a Rockie before he was a Yankee and the Yankees released him after Spring Training in 2021 before the Rockies signed him for his second stint with the team). Obviously, the first list is the best of the two.
But that could change if the Colorado Rockies swung some trades with the Yankees for some major league talent. That’s not to say that the Yankees would (or should) trade some of these players but some of them may be traded when the MLB lockout ends because, despite being a playoff team, the Yankees have a lot of things they have to address before the start of the season.