The MLB trade deadline has opened a wealth of opportunities for fantasy managers, particularly in finding new closers and position players who have stepped into larger roles. The balance of the season is critical, whether you're contending for the top spot or trying to secure a playoff berth, making strategic additions vital at this juncture. Although many waiver wires have been combed clean, a select few under-rostered players could make a significant impact.

JoJo Romero of the Cardinals, now a closer following Ryan Helsley's trade, presents a solid option. He’s demonstrated reliability with two saves recently, and though he lacks the traditional closer profile, he has three quality pitches to work with and should see plenty of save opportunities.

Francisco Alvarez has returned from a minor league stint and is hitting with power, showcasing an OPS of .984 recently. His ability to generate hard contact suggests that he might be ready to carry this momentum into the fantasy playoffs.

Finally, Tyler Locklear, now the first baseman for the Diamondbacks, brings impressive minor league numbers to the table. His potential for power and speed makes him an attractive addition for teams looking to bolster their lineup during the final stretch of the season.

The MLB trade deadline has far-reaching impacts beyond just the star players on the move. With 50 trades made in the final hours leading up to the deadline, many roles within teams are up for grabs, creating opportunities for lesser-known players to step into critical positions. Fantasy baseball managers should take note of these changes, as several players have seen their value skyrocket due to recent trades.

For instance, Tyler Locklear of the Arizona Diamondbacks is filling in at first base due to an injury to Pavin Smith, making him a hot pickup in leagues. Likewise, Randy Rodriguez has emerged as a prime candidate for the Giants' closer role following the trade of Camilo Doval. The Marlins promoted Jakob Marsee, who made a dazzling debut, while JoJo Romero steps into a closing opportunity with the Cardinals. Meanwhile, Dennis Santana from the Pirates could become a key reliever following David Bednar's departure. Keep an eye on these players as they may prove pivotal to your fantasy playoff hopes.

As the 2025 MLB season approaches, several top prospects are poised to make significant impacts for fantasy baseball managers this upcoming year. With the trade deadline having reshaped team rosters, particularly in Arizona and Baltimore, opportunities for rookie call-ups are ripe. Tyler Locklear's recent promotion to the Arizona Diamondbacks makes him a compelling add in deeper leagues. Meanwhile, teams may push for further promotions post mid-August to maintain rookie eligibility for next season, especially for talents like Dylan Beavers and Samuel Basallo.

Beavers has been a standout for the Norfolk Tides and is showcasing robust offensive metrics, including a .307 average paired with impressive power and speed. Similarly, Jordan Lawlar, now returning from injury, is set to capitalize on an open position in Arizona. His offensive prowess at Triple-A this season has been noteworthy, boasting a .319 average with power and speed. JJ Wetherholt is making waves in St. Louis, recently showcasing his offensive potential with a scorching hot streak that highlights his blend of contact, power, and speed. Other prospects like Owen Caissie and Moises Ballesteros might find themselves in contention for playing time if injuries occur among current MLB players, making them potential stashes in redraft leagues.

The Seattle Mariners have made a significant move by acquiring third baseman Eugenio Suárez from the Arizona Diamondbacks in exchange for three prospects, including Tyler Locklear. With 36 home runs this season, Suárez is expected to greatly enhance the Mariners' offensive power. His addition to a lineup that already features MVP candidate Cal Raleigh, Julio Rodríguez, and Randy Arozarena transforms Seattle into a formidable contender as they vie for a playoff spot.

Currently at 57-52, the Mariners are tied for the last wild-card spot in the AL with the Texas Rangers. This trade comes after recent acquisitions and a strategic reshaping of their roster, aiming to bolster both the batting lineup and pitching rotation for a strong playoff push. With a solid mix of power hitters and a robust starting rotation, Seattle looks well-positioned for October baseball.

A significant four-player trade has taken place between the Seattle Mariners and the Arizona Diamondbacks, sending third baseman Eugenio Suárez back to Seattle. The Mariners are acquiring Suárez, who recently recorded 36 home runs this season, in exchange for first baseman Tyler Locklear and right-handed pitchers Hunter Cranton and Juan Burgos. This move is viewed as a strategic enhancement for the Mariners' lineup, particularly at third base, where they have struggled offensively.

Suárez's return is especially welcomed as the Mariners push for a playoff spot, aiming to overtake the Houston Astros in the American League West. Despite his impending free agency and defensive limitations, the Mariners believe Suárez's power bat will significantly improve their chances at the plate. Comparatively, the Diamondbacks’ return is considered slightly underwhelming given Suárez's offensive potential, particularly Locklear, who has been promoted but carries some risks with his swing-and-miss tendencies.