Edwin Diaz’s Role in the Mets’ Bullpen, A Statistical Breakdown

Quick Answer

Edwin Díaz's 2026 season with the Dodgers represents one of the most dramatic statistical reversals in recent reliever history. After posting a 1.63 ERA with 28 saves and 98 strikeouts for the Mets in 2025, Díaz entered August 2026 with an 11.00 ERA across 11 appearances for Los Angeles.

The drop in fastball velocity — from 97.2 mph in 2025 to 95.7 mph before his elbow surgery — combined with a 2.444 WHIP and 15 hits allowed in just 9.0 innings, explains why the Dodgers have been exploring alternative roles for the former All-Star closer.

Key Facts

• Díaz signed with the Dodgers as a free agent on December 12, 2025, after spending the 2019-2025 seasons with the Mets
• His 2025 Mets season: 1.63 ERA, 28 saves in 31 chances, 98 strikeouts, 66.1 innings across 62 appearances
• His 2026 Dodgers season through August: 11.00 ERA, 11 appearances, 9.0 innings, 15 hits, 11 earned runs, 3 home runs, 7 walks, 14 strikeouts
• Fastball velocity dropped from 97.2 mph (2025) to 95.7 mph before he went on the injured list
• Underwent surgery in April 2026 to remove loose bodies from his throwing elbow
• Returned from the injured list but has continued to struggle, including blowing a save that led to a walk-off loss during the Dodgers' seven-game losing streak
• Díaz posted a 2.93 ERA with 144 saves across six seasons with the Mets, earning two All-Star selections and two NL Reliever of the Year awards
• His 2026 splits show particular trouble against NL opponents: 7 earned runs in 5.0 innings with 5 walks
• August 2026 numbers: 4 earned runs in 3.0 innings across 4 appearances, including 2 home runs allowed

The Statistical Chasm 2025 Mets Díaz vs. 2026 Dodgers Díaz

The numbers tell a story that almost defies belief. In 2025, Edwin Díaz was arguably the best closer in baseball.

His 1.63 ERA over 66.1 innings was elite by any standard. The 98 strikeouts against just 21 walks produced a 4.67 strikeout-to-walk ratio.

He converted 28 of 31 save opportunities. Batters managed a .532 OPS against him.

He was an All-Star and won NL Reliever of the Year. The 2026 version of Díaz with the Dodgers has been statistically unrecognizable.

Through 11 appearances and 9.0 innings, he has allowed 15 hits — more than a hit and a half per inning. His 11 earned runs have come with 3 home runs surrendered.

The 7 walks suggest a command issue that simply did not exist in 2025. The 2.444 WHIP indicates that base runners have been constant, making every appearance an adventure.

Perhaps most telling is the home/road and league split. Against NL opponents, Díaz has allowed 7 earned runs in just 5.0 innings, walking 5 batters.

At home, he has been slightly better but still poor: 5 earned runs in 7.0 innings. The August numbers, covering his most recent 4 appearances, show 4 earned runs in 3.0 innings with 2 home runs allowed — meaning his struggles have not abated since returning from the injured list.

What Changed Mechanically

The most concrete explanation comes from the velocity data. Before his April 2026 surgery to remove loose bodies from his elbow, Díaz's fastball averaged 95.7 mph — down a full 1.5 mph from the 97.2 mph he averaged in 2025.

For a pitcher whose entire approach is built around overwhelming hitters with elite velocity and a devastating slider, that drop is not a minor detail. It changes the timing dynamics of every at-bat.

The Dodgers publicly expressed belief that his velocity would return once the loose bodies were removed from the elbow. That surgery occurred in April, and Díaz began a rehab assignment in July.

The rehab appearances themselves showed some promise — reports indicated he was sharp in those outings. But the results upon returning to the majors have not matched the expectations.

The Tanner Scott Comparison

The Yahoo Sports analysis drew a direct comparison to Tanner Scott's 2025 season, describing Díaz as having "pulled a 2025 Tanner Scott" and becoming "a major liability." The implication is clear: the Dodgers signed Díaz expecting the 2025 Mets version, and instead received a pitcher who cannot be trusted in high-leverage situations. This comparison matters because it frames the Dodgers' decision-making process.

A team with World Series aspirations cannot continue running out a closer with an 11.00 ERA in tight games. The calculation shifts from "how do we fix him" to "how do we minimize the damage he can cause."

How the Mets Relationship Shaped His Career Trajectory

Understanding Díaz's 2026 struggles requires context from his six seasons in New York. From 2019 through 2025, Díaz was the Mets' closer, accumulating 144 saves with a 2.93 ERA.

He made the All-Star team twice and won NL Reliever of the Year twice. He became a fan favorite in Queens, known for his entrance music and his dominance.

The 2025 season was his crowning achievement with the Mets. Beyond the raw numbers — 1.63 ERA, 28 saves, 98 strikeouts — there were moments that defined his excellence.

On September 1, 2025, he secured his 250th career save by striking out Dillon Dingler, locking down a 10-8 Mets win over the Tigers. During May of that season, he was nearly unhittable, allowing batters to go 0-for-30 against him at one point.

The Decision to Leave

When Díaz elected free agency on November 4, 2025, the expectation in many quarters was that he would remain with the Mets. Mets owner Steve Cohen was publicly uncertain about why Díaz chose to leave.

Díaz signed with the Dodgers on December 12, 2025, a decision that shocked many in the organization and the fan base. The move made sense from a competitive standpoint — the Dodgers are perennial contenders with a strong bullpen infrastructure.

But it also meant leaving a situation where Díaz had established deep relationships, a defined role, and a track record of success. The transition to a new team, new city, and new coaching staff carries adjustment costs that statistics often fail to capture.

The Elbow Problem

The physical issues began almost immediately. Díaz went down with loose bodies in his throwing elbow in April 2026 and underwent surgery shortly after.

The Dodgers announced he was expected to return during the second half of the season. The rehab assignment began in July, and by late July and early August, he was back on the major league roster.

The surgery itself was not the same procedure Blake Snell received, as the Yahoo report noted — a distinction that matters because it suggests the issue was less severe than some other elbow problems. The removal of loose bodies is generally considered a relatively minor procedure compared to ligament reconstruction or other structural repairs.

The expectation was that Díaz would regain his velocity and effectiveness once the mechanical irritation was resolved. That expectation has not materialized.

As of mid-August 2026, Díaz remains on the injured list, and the Dodgers have had to explore other options for the closer role.

The Dodgers' Bullpen Calculus

The Dodgers entered 2026 with one of the deepest bullpens in baseball. The roster includes Tanner Scott, Evan Phillips, Alex Vesia, and a host of other capable arms.

The addition of Díaz was meant to be the finishing piece — a dominant closer who could shorten games and take pressure off the rest of the relief corps. That plan has not survived contact with reality.

With Díaz struggling and then injured, the Dodgers have had to redistribute high-leverage innings. The result has been a team that lost seven consecutive games at one point, with a walk-off home run against Díaz serving as a particularly painful low point.

The Role Question

The Yahoo Sports analysis was blunt: "They simply have to find another role for Díaz." This suggests that even when healthy, Díaz may no longer be suited for the ninth inning. The question becomes what role fits a pitcher whose velocity is down and whose results have been poor.

Options include using Díaz in lower-leverage situations to rebuild confidence, deploying him in the seventh or eighth inning where the pressure is less acute, or limiting him to appearances against specific portions of the lineup. None of these options are ideal for a pitcher making the kind of money Díaz commands, but the alternative — continuing to run him out in save situations — is not viable.

The Velocity Question

The Dodgers' belief that Díaz's velocity would return after surgery has not yet been validated. The pre-surgery average of 95.7 mph was already concerning; if Díaz returned without regaining the 97-plus mph velocity that made his slider nearly unhittable, his effectiveness will remain compromised regardless of the role he occupies.

The relationship between velocity and Díaz's success is well-documented. His slider, which averaged 91.8 mph with a spin rate of 2358 rpm on his 250th career save, plays differently when hitters must also respect a 97 mph fastball.

At 95.7 mph, hitters can sit on the slider more aggressively, which changes the entire dynamic of the at-bat.

What the Numbers Mean for the Rest of 2026

The FanGraphs projection system still expects Díaz to finish the season with respectable numbers — a projected 3.05 ERA with 36 saves across 66.0 innings. That projection was made before his August struggles, however, and the gap between projection and reality has widened considerably.

The Baseball-Reference numbers are less forgiving. His 2026 WAR is already -0.7, meaning he has been a below-replacement-level contributor.

His FIP of 4.81 suggests his ERA is worse than his peripherals would indicate, but even that adjusted number is far below what the Dodgers expected when they signed him.

The Remaining Schedule

Díaz's 2026 splits through August show a pitcher who has been worse against left-handed hitters than right-handed ones, though the sample size is too small for definitive conclusions. What is clear is that the Dodgers cannot rely on him as their primary closer for the remainder of the season without accepting significant risk.

The team's seven-game losing streak, which included a walk-off loss against Díaz, demonstrated the cost of running a struggling pitcher out in high-leverage situations. The Dodgers have the bullpen depth to absorb Díaz's struggles — Tanner Scott and Evan Phillips are both capable of closing games — but the roster construction becomes more complicated when the highest-paid reliever cannot be trusted in the most important moments.

The Long-Term Outlook

Díaz's contract with the Dodgers runs through at least the 2026 season, and the team's investment in him suggests they will give him every opportunity to regain his form. The elbow surgery was designed to fix a mechanical issue; if the velocity returns, the results may follow.

But there are no guarantees. Pitchers in their early 30s do not always regain velocity after elbow procedures.

The 2025 season may have been the peak of Díaz's career, and the 2026 season may be the beginning of a decline that no amount of rehab can reverse. For the Dodgers, the calculation is straightforward: they need to win now, and they have the bullpen depth to do so without Díaz at his best.

For Díaz, the calculation is personal: he needs to prove that the 2025 version of himself still exists, and he needs to do it in a new uniform, in a new city, under the brightest spotlight in baseball.

Frequently Asked Questions

Why did Edwin Díaz leave the Mets for the Dodgers?

Díaz elected free agency on November 4, 2025, and signed with the Dodgers on December 12, 2025. Mets owner Steve Cohen expressed uncertainty about why Díaz chose to leave, but the Dodgers offered a competitive situation with a strong bullpen infrastructure.

The specific terms and reasoning behind the decision have not been fully disclosed.

What was Edwin Díaz's injury in 2026?

Díaz underwent surgery in April 2026 to remove loose bodies from his throwing elbow. The Dodgers expected him to return during the second half of the season.

He also has a patellar tendon injury that required surgery, with a recovery time of 6-8 months. He began a rehab assignment in July 2026.

How much has Edwin Díaz's velocity dropped?

Díaz's fastball averaged 95.7 mph before his 2026 elbow surgery, down from 97.2 mph in 2025. The Dodgers believed his higher velocity would return once the loose bodies were removed from his elbow.

What were Edwin Díaz's stats with the Mets in 2025?

In 2025, Díaz posted a 1.63 ERA with 28 saves in 31 chances across 62 appearances. He recorded 98 strikeouts in 66.1 innings with a 0.874 WHIP.

He made the All-Star team and won NL Reliever of the Year.

Is Edwin Díaz currently on the injured list?

As of August 2026, Díaz remains on the injured list for the Dodgers. He had been activated earlier in the season and made 11 appearances before his current stint on the IL.

Reference Notes

Information in this article is based on publicly available sources. Some details may change over time.

Verify with official sources before acting.