Navigating the bullpen is often the most volatile and frustrating aspect of managing a winning team, and the first half of the MLB season has proven that Fantasy Baseball relievers remain as unpredictable as ever. From elite closers losing their grip on the ninth inning to unheralded setup men becoming statistical darlings, the relief landscape has shifted dramatically since Opening Day. As we cross the midseason mark, it is time to evaluate who has delivered elite value, who has cratered your ratios, and which arms are currently sitting on the waiver wire ready to bolster your roster for a second-half push.
The First-Half Relief Pitcher MVPs
When discussing the top-performing Fantasy Baseball relievers of the first half, the conversation must begin with Ryan Helsley of the St. Louis Cardinals. Helsley has been the gold standard for consistency, leading the league in saves while maintaining a strikeout rate that keeps fantasy managers ahead in multiple categories. His ability to lock down games for a Cardinals team playing in frequent tight contests has made him arguably the most valuable asset drafted at his position.
Joining him in the elite tier is Carlos Estevez. While he may not have entered the season with the same pedigree as some top-five closers, Estevez has been a model of efficiency. His control has improved significantly, and he has solidified the back end of the bullpen, providing high-leverage production that has exceeded his average draft position (ADP). Managers who took a chance on Estevez in the middle rounds are reaping the rewards of a high-floor, high-ceiling performer.
High-Profile Busts: Closers Who Have Underperformed
On the opposite end of the spectrum, several high-draft-pick relievers have left managers scrambling for replacements. Perhaps the most notable disappointment has been Edwin Diaz. After returning from a major injury, Diaz has struggled with uncharacteristic command issues and a dip in velocity at various points, leading to blown saves and a stint on the injured list. While the strikeout upside remains, his lack of reliability has been a major blow to those who spent a premium pick on him.
Similarly, Paul Sewald and Josh Hader have faced significant hurdles. Hader’s transition to a new environment in Houston started with a series of rocky outings that inflated his ERA and WHIP early on. While he has shown flashes of his former dominance, the early-season damage was difficult for many fantasy teams to stomach. Sewald, meanwhile, has dealt with health concerns and inconsistency, failing to provide the lockdown security that managers expected when they drafted him as a top-tier closing option.
Waiver Wire Steals and Rising Stars
The beauty of the relief market is the constant emergence of new talent. Jeff Hoffman has been a revelation for the Philadelphia Phillies. Once a journeyman, Hoffman has found a home in high-leverage situations, racking up holds and occasional saves while posting elite peripheral stats. He is a prime example of a "waiver wire steal" who has become a weekly must-start in almost all formats.
Other names that have emerged as savvy pickups include Dylan Lee and Gregory Soto. These pitchers have benefited from injuries or shifting roles within their respective bullpens. In deeper leagues, arms like Jacob Latz and Rico Garcia have begun to surface as viable options for managers looking to stabilize their WHIP or hunt for vulture wins and holds. Even Daniel Palencia and Bryan Baker have shown flashes of utility in specialized formats where strikeout-per-nine (K/9) ratios are prioritized.
Strategic Stashes and Second-Half Outlook
As we look toward the trade deadline, the hierarchy of bullpens will undoubtedly change. One of the most important names to monitor is Devin Williams. The Brewers' star closer has been sidelined for the entire first half, but his return could be a season-defining event for fantasy managers who have been stashing him in an IL spot. When healthy, Williams possesses one of the most dominant pitches in baseball—the "Airbender" changeup—and he should immediately reclaim his status as a top-five reliever.
Managers should also keep an eye on young arms like Aaron Ashby or prospects like Grant Taylor and Riley O'Brien, who could see increased roles if veterans are moved at the trade deadline. The key to winning the relief battle in the second half is staying ahead of the news cycle. Whether it is a minor injury to a starter or a change in a manager's late-inning philosophy, being the first to the waiver wire for the next Fantasy Baseball relievers breakout is essential for a championship run.
- Target for Saves: Ryan Helsley, Carlos Estevez
- Target for Holds/Ratios: Jeff Hoffman, Dylan Lee
- Stash Candidates: Devin Williams, Aaron Ashby
- Risky Assets: Edwin Diaz, Paul Sewald
Sources & Original Reporting
