Ranking the 10 Biggest MLB Trade Deadline Mistakes of the Last Decade - Sports Illustrated
Sports Illustrated analyzes the ten most significant mistakes made by MLB teams during the trade deadline over the last decade. The piece focuses on how poor decision-making regarding player assets can negatively impact a franchise's long-term competitiveness.
Why it matters
Understanding historical trade errors provides insight into the strategic complexities and high-stakes decision-making processes of professional sports management.
The finishing touches of championship rosters can be built at the MLB trade deadline. It’s also where franchises can make a mistake that haunts them for years.
Every year, front offices around baseball decide whether to buy at the deadline and add a missing piece to their lineup or pitching staff to make a postseason push. Others sell their coveted assets for a pile of prospects and aim to compete down the road.
As we approach the 2026 trade deadline at 6 p.m. ET Monday, here’s a look at the 10 biggest mistakes of the last 10 trade deadlines, dating back to 2016:
Mariners receive: Luis Castillo Reds receive: Noelvi Marte, Edwin Arroyo, Levi Stoudt, Andrew Moore
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