After the Mariners traded for Eugenio Suárez on Wednesday night, it became clear that Matt Shaw was the primary third baseman moving forward. Nonetheless, a roster addition was still needed. Willi Castro had been a name of interest over the past few weeks, and Jed Hoyer has now made it happen.
Willi Castro to Cubs for prospects
— Jon Heyman (@JonHeyman) July 31, 2025
Castro is an ideal offensive addition for the Cubs, posting a 109 wRC+ and a .335 OBP over 86 games with the Minnesota Twins.