Last Updated: June 17th, 2026 by Jeffrey Christo
Baseball trades are like family recipes – everyone has an opinion, and the arguments can last generations. From deadline deals to winter meetings shockers, these swaps changed franchises forever. Some worked out for everyone, others… well, just ask any Red Sox fan about Babe Ruth.
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11. The Ruth Sale That Cursed the Sox (1920)
We often forget that Ruth was on Boston for over half a decade. The numbers still stagger: $100,000 and a loan to finance a Broadway play. That’s what it took to send baseball’s greatest player to New York, launching the Yankees dynasty and supposedly cursing Boston for 86 years. Sox owner Harry Frazee needed quick cash – he got it, along with decades of sleepless nights for Red Sox Nation.
10. The Big Red Machine’s Engine: The Joe Morgan Mega-Deal
The 1971 eight-player blockbuster sent Joe Morgan, Ed Armbrister, Jack Billingham, César Gerónimo, and Denis Menke to Cincinnati for Lee May, Tommy Helms, and Jimmy Stewart. Houston got their power-hitting first baseman in May, but the Reds acquired the final pieces of a dynasty. Morgan won two MVPs, while Billingham and Gerónimo helped power Cincinnati to back-to-back World Series titles in ’75 and ’76. Sometimes big trades work out for both sides – but this one built a Machine.
9. How Seattle Lost The Big Unit (And Arizona Won it All)
The Mariners traded Randy Johnson to the Houston Astros at the 1998 trade deadline for three players (Freddy Garcia, Carlos Guillen, and John Halama). Johnson then signed with the Arizona Diamondbacks as a free agent that offseason. Just a few years later, in 2001, Johnson was winning a World Series for the Diamondbacks while Mariners fans watched their former ace celebrate in the desert.
8. Lou Brock for Ernie Broglio: Cardinals Highway Robbery
The Cubs thought they were getting an ace in Broglio. Instead, they watched Brock become a Hall of Famer in St. Louis, stealing 938 bases and collecting 3,023 hits. Broglio won just seven more games for Chicago before arm troubles ended his career in 1966.
7. Frank Robinson to Baltimore: How the Reds Got It Wrong
Cincinnati thought Robinson was “an old 30” in 1965. He responded by winning the Triple Crown and MVP in his first Baltimore season, leading the O’s to their first World Series title. The Reds got Milt Pappas and change – and years of regret.
6. Pedro to the Expos: The Dodgers’ $200 Million Mistake
LA thought Pedro was too small to be a starter, trading him for Delino DeShields in 1993. Martinez went on to become one of baseball’s most dominant pitchers, while DeShields lasted just three disappointing seasons in Dodger blue.
5. Jeff Bagwell for Larry Andersen: Red Sox Nation Still Hurts
Boston needed bullpen help for their 1990 playoff push. They got 22 innings from Andersen before he left via free agency. Houston got a future Hall of Famer who’d slug 449 homers over 15 years. Sometimes deadline deals come with decades of regret.
4. The Indians’ Rocky Colavito Trade That Sparked a Curse
Cleveland’s beloved slugger was traded to Detroit for Harvey Kuenn in 1960, right after winning the AL home run crown. Fans never forgave GM Frank Lane, and the “Curse of Rocky Colavito” became part of Cleveland baseball lore for decades to follow.
3. Jay Buhner for Ken Phelps (Frank Costanza Was Right)
“What the hell did you trade Jay Buhner for?” Frank Costanza’s famous Seinfeld rant summed up this 1988 disaster. Phelps hit 17 homers for the Yankees; Buhner crushed 307 for Seattle over 14 years. Sometimes TV sitcoms get baseball history exactly right.
2. Keith Hernandez to the Mets: Cardinals’ Coffee Shop Blunder
St. Louis thought Hernandez was past his prime in 1983, trading him for pitchers Neil Allen and Rick Ownbey. Instead, Keith became the heart of the Mets’ championship team, while Cardinals fans still debate this trade over coffee at Busch Stadium.
1. Five-for-One: Von Hayes Trade Changes Two Franchises
The Phillies sent five players to Cleveland for Hayes in 1982, including future All-Star Julio Franco. While Hayes became a solid player in Philadelphia, the sheer size of the deal made it impossible to live up to expectations. Sometimes, less is more in baseball trades. Hayes was a good player, though, so this one was just a slight edge to Cleveland.
