2026 Fantasy Baseball Closer Rankings (Week 4): Riley O’Brien Rising, Ryan Walker Falling
The 2026 fantasy baseball closer rankings are already in flux, with bullpen roles changing quickly as injuries pile up, performance fluctuates, and managers lean more heavily on matchup-based decisions. Just a few weeks into the season, several unexpected arms have stepped into ninth-inning duties, while some established closers are showing inconsistency or facing increasing pressure on their job security.
For fantasy managers, staying on top of these developments is crucial—not only for securing saves, but also for protecting ratios and getting the most out of every roster spot. In this week’s rankings, we break down the evolving closer tiers, highlight emerging bullpen options, and identify situations that deserve close attention heading into another important scoring period.
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2026 Fantasy Baseball Closer Rankings – The Closer Report (Week 4)
The 2026 fantasy baseball closer rankings continue to take shape heading into Week 4, though plenty of bullpen situations remain unsettled. We’re seeing more committees develop, roles continue to evolve, and a number of relievers building early momentum to either secure or take over ninth-inning opportunities.
Whether you’re targeting saves, trying to stabilize ratios, or speculating on the next emerging closer, staying on top of these shifting situations is essential. This week’s closer report highlights the most impactful bullpen trends around the league, giving you the edge needed to keep up in an ever-changing relief landscape.
Tier 1 – Elite 2026 Fantasy Baseball Closers
- Mason Miller, San Diego Padres
- Jhoan Duran, Philadelphia Phillies
Honestly, Mason Miller deserves to be in a category of his own. Through 7 appearances, Miller boasts an other-worldly 23.32 K/9, striking out 19 batters in just 7.1 IP, walking just one. And while a 0.00 ERA is as good as it gets, a (league-leading) negative 1.58 FIP and (league-leading) negative 1.21 xFIP are even more impressive.
I could post Miller stats and metrics all day, so here are just a few more tidbits.
Tier 2 – High-End 2026 Fantasy Baseball Closers
- Edwin Diaz, Los Angeles Dodgers
- Andrés Muñoz, Seattle Mariners
- Devin Williams, New York Mets
- Cade Smith, Cleveland Guardians
- David Bednar, New York Yankees
- Trevor Megill, Milwaukee Brewers
- Aroldis Chapman, Boston Red Sox
- Raisel Iglesias, Atlanta Braves
- Ryan Helsley, Baltimore Orioles
- Jeff Hoffman, Toronto Blue Jays
Update – April 15th: Trevor Megill had his second disastrous outing in a row, allowing 3 runs and taking a blown save. This is after allowing 4 runs, not recording an out, and taking a loss last Friday. In those 2 appearances, Megill allowed 7 runs over 1 IP. Not great! With a stud in Abner Uribe waiting in the wings, Megill, at least for now, should be bumped down the rankings behind Hoffman due to recent struggles and uncertain job security moving forward.
With reports of Edwin Diaz‘s fastball velocity down, Diaz slips to the top of Tier 2 in Week 4’s rankings.
Dodgers’ Manager Dave Roberts reported on Monday that Diaz would potentially be able to pitch the series opener, so Diaz looks to be in the clear for now, but this will definitely be a situation to monitor moving forward.
Ryan Helsley looks to have regained his confidence in his new Orioles’ uniform. After posting a 4.50 ERA in 2025, Helsley has converted all 5 of his save opportunities in 2026, boasting a 12.79 K/9, as well as a 2.84 ERA and 2.24 FIP. Sure, the walks have been a major issue (5.68 BB/9), but an elevated walk rate (3.75 BB/9 career) has never stopped Helsley from posting high-end numbers (2.95 career ERA, 3.27 career FIP) throughout his time in MLB.
Although he recently turned the ripe old age of 36, Raisel Iglesias can still get it done at the end of games. Iglesias has yet to allow a run or walk a batter across 6 appearances, converting all 3 of his saves for the Braves, who look to be one of the best teams in baseball. If Iglesias can keep the walks and homers to a minimum, he could end up ranking as a top 5 2026 fantasy baseball closer by season’s end.
Tier 3 – Reliable 2026 Fantasy Baseball Closers
- Riley O’Brien, St. Louis Cardinals
- Daniel Palencia, Chicago Cubs
- Kenley Jansen, Detroit Tigers
- Paul Sewald, Arizona Diamondbacks
- Lucas Erceg, Kansas City Royals
- Jordan Romano, Los Angeles Angels
- Pete Fairbanks, Miami Marlins
- Emilio Pagán, Cincinnati Reds
A priority Week 4 add, Riley O’Brien appears unhittable to start the 2026 season. Across 9 appearances, O’Brien has yet to issue a walk and sports a cool 0.00 ERA, as well as a 1.43 xERA, 1.63 FIP, and 2.12xFIP.
The contact against O’Brien has been weak, and while the strikeouts have not been as plentiful as expected, fantasy managers would take the more methodical, controlled approach given the results to date.
Trivia question – who currently leads MLB in saves? If you guessed priority Week 4 waiver wire target Paul Sewald, you deserve a gold star!
Sewald is 6/6 in save opportunities this year, striking out 10 batters over 9 appearances and walking 0. The wily veteran may not have swing-and-miss stuff, but he can locate it with the best of them.
Tier 4 – Shaky 2026 Fantasy Baseball Closers
- Ryan Walker, San Francisco Giants
- Dennis Santana, Pittsburgh Pirates
- Clayton Beeter, Washington Nationals
- Seranthony DomÃnguez, Chicago White Sox
- Bryan Baker, Tampa Bay Rays
- Jakob Junis, Texas Rangers
- Victor Vodnik, Colorado Rockies
With the Giants struggling to win games, and Ryan Walker struggling to find the strike zone, Walker’s job and fantasy value both appear to be in flux.
Walker has struggled since becoming a known commodity in 2024, and 2026 looks less promising given the outlook of San Francisco in 2026.
Jakob Junis recorded his team-leading third save for the Texas Rangers, and appears to be the leader in the clubhouse for the closers’ role at this point. He remains a priority waiver pickup where available.
Tier 5 – Volatile 2026 Fantasy Baseball Closers
- Bryan King, Houston Astros
- Joel Kuhnel, Athletics
- Cole Sands, Minnesota Twins
As proffered in Week 3, Bryan King should be the leading candidate for saves in the Astros bullpen. Bryan Abreu did not allow a run for the first time in seven appearances to start the 2026 season (16.20 ERA and 3.60 WHIP across 7 appearances), and King sports an excellent 12.38 K/9 and 1.13 ERA. Of course, Josh Hader is ramping up and faced hitters in his first live BP since a biceps injury, so King’s duties may be short-lived.
Final Thoughts on 2026 Fantasy Baseball Closer Rankings (Week 4)
The 2026 fantasy baseball closer rankings continue to evolve as we move further into April, with bullpen roles still sorting themselves out across the league. While some teams have begun to settle on dependable ninth-inning options, plenty of situations remain unsettled, making it important for fantasy managers to stay proactive. Identifying rising relievers, backing up unstable bullpens, and reacting quickly to changing roles can create a meaningful edge in the saves category.
As always, opportunity and consistency remain the foundation when evaluating relief pitchers, and those who stay in tune with the latest trends will be in the best position for sustained success. Be sure to keep checking in on the 2026 fantasy baseball closer rankings each week as we continue to track bullpen movement and help you stay ahead in an ever-changing landscape.
