Top 10 MLB Free Agent Relievers: Best Bullpen Arms for 2025

1. Tanner Scott

2024 Key Stats: 1.75 ERA. 10.5 K/9

The best reliever on the market, Tanner Scott combines elite strikeout ability with proven postseason performance. Expect Scott to sign a four-year deal at $15M–$17M AAV, making him the marquee bullpen addition this offseason.

9. Carlos Estévez

2024 Key Stats: 2.45 ERA, Sub-1.00 WHIP

After posting the best season of his career, Carlos Estévez could see regression due to a FIP nearly a full run higher than his ERA. Nonetheless, his 2024 numbers make him a top target for teams needing bullpen stability, with a two- to three-year deal around $10M AAV in his future.

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8. Danny Coulombe

2024 Key Stats: 2.12 ERA, 9.7 K/9

After three consecutive seasons with a sub-3.00 ERA, Danny Coulombe is one of the most consistent lefty relievers available. Due to age and injury history, expect a one-year deal around $5M AAV, offering excellent upside at a bargain price.

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7. Clay Holmes

2024 Key Stats: 30 Saves, 3.14 ERA

With 74 saves over the past three seasons, Clay Holmes has proven he can perform in high-pressure environments. His contract will likely land at three to four years, $12M–$15M AAV, making him a top choice for teams needing a proven closer.

6. Kenley Jansen

2024 Key Stats: Over 10 K/9, 3.00 FIP

At 36, Kenley Jansen continues to deliver elite results. With his consistency and poise, Jansen should secure a two-year deal at $15M AAV, providing veteran leadership and high-leverage performance.

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5. Chris Martin

2024 Key Stats: 16.67 K/BB Ratio: 16.67, Sub-3.00 FIP

Chris Martin brings elite command and versatility to any bullpen. Despite his age, his ability to dominate in the late innings could earn him a one- to two-year deal worth $5M AAV, with the potential to outperform expectations.

4. Aroldis Chapman

2024 Key Stats: 14.3 K/9, 0.7 HR/9

While age has tempered Aroldis Chapman’s dominance, his ability to generate strikeouts and limit home runs remains elite. Chapman will likely command a one- or two-year deal at $8M–$10M AAV, making him a valuable addition for contenders.

3. David Robertson

2024 Key Stats: 3.00 ERA, 2.65 FIP

Despite his age, David Robertson continues to perform at a high level. With a K/9 of 12.4, he’s still a strong back-end option. A one- or two-year deal worth $7M–$10M AAV seems reasonable for the veteran righty.

2. Jeff Hoffman

2024 Key Stats: 2.17 ERA, Sub-1.00 WHIP

Jeff Hoffman has emerged as a top-tier bullpen arm, excelling in every major statistical category. His lack of closing experience may limit his market slightly, but he should secure a multi-year deal at $7M–$9M AAV.

1. Tanner Scott

2024 Key Stats: 1.75 ERA. 10.5 K/9

The best reliever on the market, Tanner Scott combines elite strikeout ability with proven postseason performance. Expect Scott to sign a four-year deal at $15M–$17M AAV, making him the marquee bullpen addition this offseason.