Last Updated: June 17th, 2026 by Michael Schatz
With baseball fans still coming to terms with the Dodgers signing yet another Japanese star free agent, it got us thinking about free agent signings of the past. The right free agent can make or break a team – or in some cases, turn a mediocre player into a superstar.
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Let’s take a look at some of the most impactful free agent signings baseball has ever seen…
1) Randy Johnson to Diamondbacks
The Arizona Diamondbacks struck gold when they signed Randy Johnson in 1999. The Big Unit was already a star, but his time in the desert took him to new heights. He won four straight Cy Young Awards with the D-backs from 1999-2002.
Johnson’s dominant pitching helped lead Arizona to a World Series title in 2001. His intimidating presence on the mound and blazing fastball made him one of the most feared pitchers of his era. The tall lefty’s signing remains one of the best free agent moves in baseball history.
2) Barry Bonds to Giants
Barry Bonds joining the San Francisco Giants in 1993 was a game-changer. He left the Pirates and came home to the Bay Area, where his dad Bobby had played. Bonds was already great, but with the Giants he became legendary. He became the all-time home run king and ended up with more MVP awards than anyone in baseball history. His signing ignited the Giants and helped make them contenders for years.
3) Greg Maddux to Braves
The Braves hit a grand slam when they signed Greg Maddux as a free agent in 1992. Maddux was coming off a Cy Young season with the Cubs, but nobody could have predicted the dominance that followed. He won the next three Cy Young Awards in Atlanta, posting mind-boggling numbers.
Maddux’s pinpoint control and baseball IQ made him nearly unhittable. He anchored one of the greatest rotations ever, helping the Braves win the 1995 World Series. The Professor, as fans called him, made pitching look easy during his 11 seasons in Atlanta.
4) Roger Clemens to Blue Jays
The Rocket’s landing in Toronto was a game-changer. After leaving Boston, Clemens signed with the Blue Jays in 1997. He promptly won back-to-back Cy Young Awards, leading the league in wins, ERA, and strikeouts both years. Clemens’ stint with the Jays was short but sweet, reminding everyone why he was one of the most dominant pitchers ever.
5) Manny Ramirez to Red Sox
Manny being Manny became a Boston staple when he signed with the Red Sox in 2000. His bat was legendary, helping the team break the Curse of the Bambino in 2004. Ramirez’s quirky personality and clutch hitting made him a fan favorite at Fenway. His eight-year stint in Boston included two World Series wins and countless memorable moments.
6) Max Scherzer to Nationals
The Nationals hit a home run when they signed Max Scherzer in 2015. His seven-year, $210 million deal looked like a lot of money at the time, but “Mad Max” proved to be worth every penny.
Scherzer dominated on the mound for Washington, racking up two Cy Young Awards and six All-Star selections. The cherry on top? He helped lead the Nats to their first World Series title in 2019.
Reggie Jackson to Yankees
In 1976, the New York Yankees signed free agent Reggie Jackson to a massive – by 1976 standards – 5-year, $2.96 million contract. The move sent shockwaves through baseball and helped usher in a new era of big-money free agency.
Jackson’s impact was immediate and electric. He smashed 32 homers and drove in 110 runs in his first season in pinstripes. But it was in the 1977 World Series where “Mr. October” truly cemented his Yankees legacy.
In the clinching Game 6, Jackson put on a show for the ages. He blasted three home runs on three consecutive pitches, powering the Yankees to their first title in 15 years.
Over his 5 seasons in New York, Jackson hit 144 home runs and helped lead the team to two World Series championships. His flair for the dramatic and clutch postseason play made him an instant Yankees icon.
Shohei Ohtani to Dodgers
The baseball world was rocked when Shohei Ohtani signed a record-breaking 10-year, $700 million deal with the Los Angeles Dodgers. This move sent shockwaves through the league, as the two-way superstar joined an already stacked team.
Ohtani’s contract blew past previous records, topping Mike Trout’s extension by over $250 million. The Dodgers had been eyeing this moment for years, even sitting out last year’s free agent frenzy to prepare for Ohtani’s availability. And did it pay off. In his first year wearing Dodger blue, Ohtani led the Dodgers to a World Series title and claimed his first NL MVP.