In Major League Baseball, players approaching free agency who are performing well for teams out of contention often emerge as prime trade candidates as the trade deadline approaches. These players, commonly known as 'rentals,' typically join their new teams for only a few months before entering the open market. In doing so, they can significantly aid contender teams in their pursuit of success while simultaneously enhancing their own value ahead of free agency. Notable examples from the previous summer include Jack Flaherty (traded from Detroit to Los Angeles), Yusei Kikuchi (Toronto to Houston), Tanner Scott (Miami to San Diego), Carlos Estévez (Los Angeles to Philadelphia), and Jesse Winker (Washington to New York). This article ranks the top 25 rental players anticipated to be available during the 2025 MLB trade market, with evaluations based on current performance, expected contributions, club control, and trade likelihood.

Among the honorable mentions slated for potential trades are several impactful players. For pitchers, names to monitor include Tyler Anderson (Los Angeles Angels), Jalen Beeks (Tampa Bay Rays), Aaron Civale (Cleveland Guardians), and Zach Eflin (Baltimore Orioles). In the batter's box, Yoán Moncada (Los Angeles Angels), Tommy Pham (Pittsburgh Pirates), and Amed Rosario (Washington Nationals) stand out as players who could change teams as the trade deadline approaches.

Starting off the rankings, Shelby Miller of the Arizona Diamondbacks ranks as number 25. Miller, a low-cost signing at $1 million, has enjoyed a solid season with a 1.98 ERA, 0.96 WHIP, and 9.9 K/9 in 37 appearances, although a recent forearm strain has raised concerns about his health. Next on the list at 24 is Michael Lorenzen of the Kansas City Royals, who has a history of deadline trades and has had moments of brilliance despite a current 4.61 ERA. At 23, Cedric Mullins of the Baltimore Orioles showcases power and speed but has struggled offensively this season. Josh Bell of the Washington Nationals, sitting at 22, is a reliable power hitter and is boosting his trade prospects with strong July stats. Charlie Morton, at 21, has regained form after a rough start and possesses valuable playoff experience, while Gregory Soto and Seranthony Domínguez of the Orioles also remain sought-after relief options. Key players like Kyle Finnegan of the Nationals and Kenley Jansen of the Angels are with the current rankings, emphasizing teams' searches for bullpen stability. The list continues with versatile infielders and emerging pitchers like Isiah Kiner-Falefa, Michael Soroka, and Zack Littell, spotlighting their ability to fill various roles that contenders may require as the trading deadline approaches.