SoDo Mojo’s thoughts on the hypothetical deal:
"“The Seattle Mariners have a logjam of outfielders and a need for pitching, particularly in their rotation. Acquiring De Leon and Beeks gives them a high lottery ticket and a safe, MLB quality arm. But these players do not come easy. For the pair, Seattle will part with OF/DH Domingo Santana and relief prospect Raymond Kerr. Santana survived just one season in Seattle but showed as an above-average hitter who can hit for power and average to all fields when he is on. Unfortunately, Seattle did not see his usual defensive value. Instead, they watched a circus at times in both left and right field, despite metrics in the past that should Santana as a passable defender. The unfortunate elbow injury derailed the second half of his season, but a healthy Santana should hit .270/.350/.475 with 30 HR power and the ability to steal 10 bags along the way. Kerr is a fast riser in the system as anytime a lefty with a 99 MPH fastball and wicked slider starts to throw strikes, it will catch people’s eyes. Kerr has a great chance to see the majors in 2020 and if he hits, he has the potential to be another Jose Alvarado type of arm. Losing these players certainly isn’t easy, but the trade addresses areas of need for both sides and does so with solid value for both teams.”"
Both teams will benefit from a trade structured similar to this and it will be interesting to see what type of package the Rays and Mariners work out if a deal for Santana comes to fruition.
It all boils down to the fact that both the Mariners and Rays have what the other needs. For the Rays it is affordable power from the right side and for the Mariners, it is affordable starting pitching. A deal like this makes sense for both sides.