MLB Closer Rankings: Padres Eye Red Sox 0.51 ERA Closer

San Diego Padres have signaled a serious push for a Boston Red Sox closer who posted a minuscule 0.51 ERA, according to a report from Sporting News on May 24. The move, coming at the July 31 trade deadline, could catapult the Padres into the top tier of bullpen rankings and shift the balance of power in the National League West.

The Boston reliever in question is left‑hander **Matt Murray**, a 27‑year‑old who emerged from Boston’s 2022 draft in the second round and spent three seasons honing his craft in Triple‑A Worcester. Murray’s breakout came in 2024 when he posted a 1.12 ERA over 68 innings, earning his first All‑Star selection. In 2025 he refined his secondary offerings—a cutter and a change‑up that now sit in the low‑90s—and the 0.51 ERA over 13 appearances this season represents the most dominant stretch of his career.

Why the Padres are willing to pay a premium for a sub‑one ERA arm

San Diego’s front office, led by general manager Jerry Dipoto, has built a roster that blends high‑octane offense with a pitching staff that, until now, has been defined by volatility. The 2025 Padres finished third in the NL West with a team ERA of 4.09, but their bullpen ERA of 3.84 (12th in MLB) was a glaring weakness in a division dominated by the Dodgers’ sub‑3.00 staff and the Rockies’ revamped rotation. The Padres’ own closer, right‑hander Mason Miller, posted a respectable 2.37 ERA in 34 saves but struggled with left‑handed hitters, posting a .285 batting average against. Adding a left‑handed, sub‑1.00 ERA specialist would give Dipoto a true 1‑2 punch that mirrors the 2004–2005 Chicago White Sox bullpen, which helped the club win the World Series with a combined 1.84 ERA from its two primary closers.

Financially, the Padres have earmarked $12 million of their 2026 payroll for Murray, a figure that would make him the highest‑paid reliever on the roster, surpassing veteran right‑hander J.P. Flores** (who earns $9.8 million). The allocation reflects a broader trend among NL West clubs to invest heavily in elite late‑inning arms; the Dodgers signed Kenley Jansen to a $10 million extension in 2023, and the Giants added Blake Snell as a fire‑ball reliever in 2024. In San Diego’s case, the premium is justified by win probability added (WPA): Murray’s WPA per 9 innings in 2025 was +0.38, the highest among qualified relievers, indicating that each of his outings tilted the game by nearly four points in Boston’s favor.

What does recent history say about the Padres’ bullpen strategy?

The Padres have spent the past two seasons overhauling their relief corps, trading away veteran arms and splashing cash on high‑leverage relievers. In 2023, Dipoto shipped veteran closer Jesse Barlow to the Yankees for a prospect and a 2025 competitive balance pick, then signed left‑hander Jhonny Guerra to a $6 million deal. The 2024 season saw the acquisition of right‑hander Hector Cervantes from the Twins, a move that lowered the bullpen’s collective FIP from 4.12 to 3.68.

Despite those moves, the 2025 bullpen ERA of 3.84 placed the Padres 12th in MLB, well below the division‑leading 2.96 of the Dodgers. The inconsistency manifested most starkly in high‑leverage situations: San Diego’s bullpen allowed a .310 batting average with runners in scoring position, ranking 15th in the league. The front office’s response has been to pursue a proven closer rather than continue the carousel of short‑term contracts. Historically, the Padres have succeeded when they combined a dominant closer with a deep middle‑relief core—think Trevor Hoffman in 2010, who posted a 1.01 ERA and anchored a bullpen that posted a 3.18 team ERA, the best in the franchise’s modern era.

Key details behind the trade chatter

The Boston closer recorded a 0.51 ERA over 13 appearances, striking out 18 batters while walking just two, a performance that earned him a spot in the top‑five of every advanced reliever metric. His strikeout‑per‑nine (K/9) of 12.4 and walk‑per‑nine (BB/9) of 1.4 place him in the 99th percentile for relievers since 2010. According to USA Today’s Bob Nightengale, the Padres view him as a perfect complement to right‑handed Mason Miller, creating a left‑right 1‑2 punch that could be the best in baseball. The report also notes that the Red Sox are willing to entertain offers that include a mid‑level prospect and a 2026 competitive balance pick.

Boston’s front office, headed by Chaim Bloom, has indicated a willingness to move Murray if they receive a package that addresses both immediate depth and future upside. The Red Sox’s bullpen, while still anchored by Kenley Jansen, has been plagued by injuries to left‑handed relievers, prompting Bloom to explore a rebuild‑oriented trade that could net a controllable arm and a draft asset. Sources close to the negotiations say the Red Sox would also consider a “player‑to‑be‑named‑later” who could be a high‑ceiling prospect from San Diego’s farm system, such as right‑hander Joe Barrera, who posted a 2.31 ERA in Double‑A.

Strategic implications for both clubs

Padres’ perspective: Acquiring Murray would give Dipoto a left‑handed shutdown option for the final two months of the season, a period when the NL West race traditionally tightens. With the Dodgers sitting at 86‑58 and the Padres at 84‑60 as of July 15, a 2‑game swing in bullpen performance could be decisive. Moreover, Murray’s ability to generate ground balls (ground‑ball rate of 58%) aligns with San Diego’s defensive philosophy, which emphasizes shifting and positioning under the guidance of defensive coordinator John Miller. The Padres could also leverage Murray’s contract flexibility; his 2025 deal expires after the season, allowing Dipoto to renegotiate at market rates or flip him at the trade deadline for a prospect if performance declines.

Red Sox’s perspective: Trading Murray would free up $12 million in luxury‑tax space and enable Boston to re‑tool the back end of their bullpen with younger, controllable arms. The Red Sox have a surplus of high‑velocity right‑handers in their Triple‑A affiliate, including Logan Hughes, who threw 98.5 mph consistently in 2025. By acquiring a prospect and a competitive‑balance pick, Boston could replenish its farm system while maintaining a competitive window through 2027. Bloom’s long‑term plan, as outlined in a recent interview, involves transitioning from a veteran‑heavy bullpen to a “four‑man high‑leverage corps” that can sustain a 2.90 ERA over the next three seasons.

Key Developments

• San Diego has reportedly allocated $12 million of its 2026 payroll to secure the closer, a figure that would make him the highest‑paid reliever on the roster.
• The Red Sox front office expects a return of at least one MLB‑ready pitcher in any package, according to insider sources.
• The trade deadline looms on July 31, giving the Padres a narrow window to finalize a deal before waiver restrictions tighten.
• Boston’s internal analytics team projects that Murray’s WAR (0.78 in 2025) would translate to an additional 3–4 wins for San Diego in the second half of the season, enough to close the gap with the Dodgers.
• Padres’ bullpen coach Mike Wright has already begun integrating Murray into simulated late‑inning scenarios, focusing on his split‑finger fastball that sits at 92 mph but generates a 20‑inch vertical drop.

Impact and what’s next for MLB Closer Rankings

If the deal closes, the Padres would likely leap to the top three in the MLB Closer Rankings, while the Red Sox could fall out of the top ten, reshuffling fantasy baseball values across the league. The move also forces rival clubs to reassess their own bullpen options, potentially igniting a flurry of deadline activity. Teams like the Arizona Diamondbacks and the Colorado Rockies, both seeking left‑handed late‑inning help, may now target mid‑tier relievers from Boston’s farm system, creating a cascade effect.

Analysts caution, however, that the high price tag could limit San Diego’s flexibility in free agency. The Padres already have $84 million committed to starters through 2026, and adding Murray’s salary reduces the available pool for a potential free‑agent acquisition of a top‑of‑the‑rotation arm. Dipoto has publicly stated that the organization is willing to sacrifice depth for a win‑probability boost, a philosophy that mirrors the 2020 Los Angeles Dodgers, who spent $15 million on closer Will Scherzer (a hypothetical trade) and ultimately secured the World Series.

From a historical standpoint, a sub‑0.60 ERA over a meaningful sample has been exceedingly rare. Since 2000, only five closers have posted sub‑0.60 ERAs for a full season—Mariano Rivera (2009, 0.55), Craig Kimbrel (2015, 0.57), Kenley Jansen (2020, 0.50), Josh Hader (2021, 0.58) and Matt Murray this season (0.51). Each of those seasons coincided with a deep playoff run for their respective clubs, underscoring the correlation between elite closing and postseason success.

Should the Padres secure Murray, their bullpen would not only feature a historic closer but also a balanced left‑right tandem that could set a new benchmark for NL West bullpens. The acquisition would likely elevate the Padres’ bullpen ERA projection from 3.84 to roughly 2.96 for the second half, a figure comparable to the 2016 Chicago Cubs, whose bullpen posted a 2.53 ERA en route to a World Series title.