Seattle Mariners ⇄ St. Louis Cardinals

Cash considerations is the whole of what changed hands besides Riley O'Brien.

Close to a wash — the margin never reached a full win.

Seattle Mariners took the better players and the contracts that came with them. St. Louis Cardinals took the room.

Tyler O'Neill stayed 6 seasons and was the best of it, and it still came out close to even.

Ty Kelly and Sam Gaviglio changed clubs, and neither amounted to much for either side.

Seattle Mariners came out ahead by 6.5 WAR, most of it from Brendan Ryan.

José Báez and Mike Potter changed clubs, and neither amounted to much for either side.