As the 2025 MLB season approaches, fantasy baseball managers are fine-tuning their rosters, and securing elite relief pitchers is a crucial component of success. With the latest updates to the RotoProspects relief pitcher fantasy baseball rankings and projections, we highlight the top closers and high-leverage arms that will shape the fantasy landscape this season.
Here at RotoProspects, we provide position-by-position 2025 fantasy baseball rankings and projections, broken into tiers. Check out a quick look at the first two tiers below. You can check out the entire list of the top 121 relief pitchers, with where they slot into eight tiers, by clicking here (subscription required). We even provide downloadable PDFs of our tiered rankings and projections for each position.
Tier 1: The Elite Closers
Emmanuel Clase, CLE (27) – The gold standard for closers, Clase’s control and consistency make him a top-tier option for fantasy managers.
Edwin Diaz, NYM (31) – A strikeout machine, Diaz remains a top closer with his electric fastball and devastating slider.
Mason Miller (pictured), OAK (26) – Emerging in 2024 as a dominant force, Miller’s high strikeout rate makes him a rising star in the closer role.
Ryan Helsley, STL (30) – Helsley’s elite velocity and swing-and-miss stuff make him a solid high-leverage arm with excellent save potential.
Josh Hader, HOU (31) – A proven closer with overpowering stuff, Hader remains a high-end fantasy option despite occasional control issues.
Devin Williams, NYY (30) – His signature “Airbender” changeup keeps hitters off balance, making him a valuable closer with strong strikeout numbers.
| No. | TIER 1 | Age | IP | ERA | W | S | SO | WHIP | K/9 | BB/9 | K/BB |
| 1 | Emmanuel Clase, Cle | 27 | 67 | 2.55 | 3 | 36 | 66 | 1.02 | 8.9 | 1.9 | 4.7 |
| 2 | Edwin Diaz, NYM | 31 | 64 | 2.71 | 4 | 35 | 93 | 1.06 | 12.9 | 3.4 | 3.9 |
| 3 | Mason Miller, A’s | 26 | 66 | 2.51 | 3 | 29 | 97 | 1.00 | 13.1 | 3.1 | 4.2 |
| 4 | Ryan Helsley, SL | 30 | 65 | 2.80 | 4 | 34 | 81 | 1.11 | 11.1 | 3.4 | 3.2 |
| 5 | Josh Hader, Hou | 31 | 66 | 3.14 | 4 | 33 | 90 | 1.10 | 12.4 | 3.6 | 3.4 |
| 6 | Devin Williams, NYY | 30 | 60 | 2.81 | 4 | 31 | 81 | 1.14 | 12.1 | 4.2 | 2.9 |
Tier 2: High-End Closers and Dominant Setup Men
Raisel Iglesias, ATL (35) – A veteran closer with pinpoint command, Iglesias remains a reliable option for saves.
Felix Bautista, BAL (30) – Now healthy again, Bautista is a dominant force with elite strikeout ability.
Jhoan Duran, MIN (27) – Duran’s triple-digit fastball makes him a prime candidate for saves and strikeouts.
Andres Munoz, SEA (26) – One of the hardest throwers in baseball, Munoz delivers high strikeout rates and solid ratios.
Ryan Walker, SF (29) – Walker’s versatility makes him an underrated option with potential for saves and holds.
Jeff Hoffman, TOR (32) – Hoffman has proven to be a valuable bullpen arm with strong peripherals.
Tanner Scott, LAD (30) – A strikeout-heavy lefty, Scott offers upside but comes with occasional control issues.
| No. | TIER 2 | Age | IP | ERA | W | S | SO | WHIP | K/9 | BB/9 | K/BB |
| 7 | Raisel Iglesias, Atl | 35 | 68 | 3.23 | 5 | 33 | 73 | 1.10 | 9.7 | 2.3 | 4.1 |
| 8 | Felix Bautista, Bal | 30 | 57 | 2.67 | 3 | 27 | 83 | 1.08 | 13.1 | 3.8 | 3.5 |
| 9 | Jhoan Duran, Min | 27 | 64 | 2.67 | 4 | 25 | 79 | 1.11 | 11.2 | 2.9 | 3.8 |
| 10 | Andres Munoz, Sea | 26 | 62 | 2.58 | 3 | 26 | 80 | 1.10 | 11.7 | 3.5 | 3.3 |
| 11 | Ryan Walker, SF | 29 | 68 | 2.96 | 4 | 26 | 81 | 1.13 | 10.6 | 2.9 | 3.6 |
| 12 | Jeff Hoffman, Tor | 32 | 64 | 3.04 | 3 | 26 | 78 | 1.11 | 11.0 | 3.1 | 3.6 |
| 13 | Tanner Scott, LAD | 30 | 66 | 2.94 | 4 | 25 | 81 | 1.18 | 11.1 | 4.1 | 2.7 |
We will keep an eye on bullpen roles as spring training finishes, as opportunities can shift quickly in the ever-changing relief pitcher landscape.