The Pittsburgh Pirates acquired right-handed reliever Ron Marinaccio from the San Diego Padres in a July 2026 trade, designating Dennis Santana for assignment. The deal, reported by MLB Trade Rumors, involved a player to be named later or cash considerations. Initial fanfare was minimal.
Marinaccio, 29, has a career strikeout rate of 10.5 K/9. He features a mid-90s fastball with elite spin and a changeup with a 35% chase rate. His FIP of 3.20 suggests his ERA underperformed his actual skill set.
The Pirates’ decision to DFA Santana was predictable. Santana posted a 4.50+ ERA and 1.45 WHIP in 2026, per CBS Sports. His arbitration eligibility made him a non-tender candidate, freeing salary for higher-impact moves.
San Diego’s bullpen depth made Marinaccio expendable. The Padres prioritized other areas at the deadline, using the trade to free a 40-man roster spot, as noted by SI.com. Marinaccio missed time in 2025 with a shoulder issue, lowering his trade value.
| Metric | Marinaccio (2026) | Santana (2026) |
|---|---|---|
| K/9 | 10.5 (projected) | 7.2 |
| BB/9 | 3.5 | 4.1 |
| FIP | 3.20 | 4.80 |
| Salary | $770K | $1.8M (arb.) |
Marinaccio’s platoon splits favor right-handed hitters (.200 BAA). He holds lefties to a .250 BAA. Projection systems like ZiPS forecast a 3.40 ERA for the remainder of 2026. For a Pirates team in a wild-card race, this is a low-risk, high-reward acquisition.
The Pirates’ bullpen currently relies on closer David Bednar. Marinaccio could slot into a high-leverage setup role. The team also made minor trades for a backup catcher and a lefty specialist, but the Marinaccio deal has the highest ceiling.
Risks exist. Marinaccio’s shoulder injury history requires strict pitch count management. His walk rate spiked to 4.5 BB/9 in some months. However, his underlying metrics—high spin rate, swing-and-miss stuff—provide a solid foundation.
💡 Frequently Asked Questions (FAQ)
- Q: Who is Ron Marinaccio and why did the Pirates trade for him?
- A: Ron Marinaccio is a 29-year-old right-handed reliever with a career 10.5 K/9, elite fastball spin, and a 3.20 FIP. The Pirates acquired him from the Padres in July 2026 for a player to be named later or cash, designating Dennis Santana for assignment. His underperformance relative to skill made him a low-cost high-upside target.
- Q: How does Marinaccio compare to Dennis Santana statistically?
- A: Marinaccio projects a 10.5 K/9, 3.5 BB/9, and 3.20 FIP in 2026, while Santana posted a 7.2 K/9, 4.1 BB/9, and 4.80 FIP. Marinaccio also earns $770K compared to Santana’s $1.8M arbitration salary, making him both more effective and more affordable.
- Q: What role will Marinaccio play for the Pirates?
- A: Marinaccio is expected to slot into a high-leverage setup role behind closer David Bednar. His strong platoon splits (.200 BAA vs. righties, .250 vs. lefties) and projected 3.40 ERA make him a valuable addition to a bullpen in a wild-card race.
- Q: Why did the Padres trade Marinaccio if he has such potential?
- A: The Padres had deep bullpen depth and prioritized other needs at the trade deadline. Marinaccio missed time in 2025 with a shoulder issue, lowering his trade value, and the move freed a 40-man roster spot for other acquisitions.
Extended Reading
MLB Trade Rumors reported the exact terms of the player to be named later have not been disclosed. SI.com noted the Padres are targeting a left-handed bat in a separate trade. The Pirates’ front office, per sources, identified Marinaccio as a buy-low target months before the deadline.