Trade Deadline TA: How Luis Castillo Became Untenable in Seattle Patrick Dubuque August 2, 2026 Share: > Image credit: Joe Nicholson-Imagn Images Subscribe to Baseball Prospectus"Monetary imbalance" doesn't look great on the back of a jersey. Full access to this article is for Premium Baseball Prospectus subscribers. Sign up today to get access to insightful analysis for the discerning baseball fan. Super-Premium - $99.95 / yearPremium - $74.95 / yearPremium Monthly - $19.95 / month Subscribe to Baseball Prospectus In This Article 0 2026 Trade DeadlineLuis CastilloSeattle MarinersSeranthony DominguezTransaction Analysis Related Articles Five & Dive Episode 569: Yan Can Cook by Jeffrey Paternostro, Craig Goldstein, and Patrick Dubuque 8/07 0 TA: The Relief of a Trade Deadline Completed $ by Craig Goldstein, Jeffrey Paternostro, and Ben Spanier 8/06 1 TA: Two Giants Shrink; One Low, Lowe Price $ by Ginny Searle 8/06 2 The Kaleidoscope $ by Jarrett Seidler 8/06 4 Transaction Analysis: One Team’s Mize B by Patrick Dubuque 8/05 2 Latest Articles Five & Dive Episode 569: Yan Can Cook by Jeffrey Paternostro, Craig Goldstein, and Patrick Dubuque 8/07 0 Building A Starting Pitcher Watchlist ’26: Post-Deadline Edition $ by Mike Couillard 8/07 0 Fantasy Starting Pitcher Planner ’26: Week 20 $ by Ryan Boyer 8/07 0 Fantasy Transaction Analysis: The 2026 Non-Contender Rundown $ by Mike Gianella 8/07 0 Box Score Banter: The Meat Loaf Fallacy $ by Andrew Mearns 8/07 1 more chevron_rightchevron_right Patrick Dubuque More about: 2026 Trade DeadlineLuis CastilloSeattle MarinersSeranthony DominguezTransaction Analysis Latest Articles Five & Dive Episode 569: Yan Can Cook by Jeffrey Paternostro, Craig Goldstein, and Patrick Dubuque 8/07 0 Building A Starting Pitcher Watchlist ’26: Post-Deadline Edition $ by Mike Couillard 8/07 0 Fantasy Starting Pitcher Planner ’26: Week 20 $ by Ryan Boyer 8/07 0 Related Articles Five & Dive Episode 569: Yan Can Cook by Jeffrey Paternostro, Craig Goldstein, and Patrick Dubuque 8/07 0 TA: The Relief of a Trade Deadline Completed $ by Craig Goldstein, Jeffrey Paternostro, and Ben Spanier 8/06 1 TA: Two Giants Shrink; One Low, Lowe Price $ by Ginny Searle 8/06 2 You need to be logged in to comment. Login or Subscribe