In this MLB mock trade, the Boston Red Sox send star third baseman Alex Bregman to the Seattle Mariners in exchange for ace Luis Castillo and key offensive depth, shaking up the playoff race before the 2025 trade deadline.

"With Hunter Dobbins out for the year and the Red Sox seemingly still uncertain about Tanner Houck's role," McCaffrey writes, "Adding a starter has become even more of a priority."