Edwin Diaz
Edwin Diaz
25-Year-Old PitcherRP
New York Mets
2019 Fantasy Outlook
Diaz ended 2018 as the top closer and looks to be one of the first off the board in 2019 after an offseason trade to the Mets. Here's the thing: amassing another 61 save chances with 57 conversions is a long shot. Last year, Diaz tied for the second-most saves in history. Even with comparable skills, 15-20 fewer is a fair expectation. Speaking of skills, they're elite. His 18.9 SwStr% was bested by only Josh Hader, and just barely at that. His K-BB% was tops in the league. Diaz throws a 98-mph fastball almost two-thirds of the time, complemented by a 90-mph slider. There's really nothing to point to in terms of luck as Diaz's BABIP, HR/FB and LOB% were all within expected ranges. The skills, hence strikeouts and ratios, are real and repeatable and thus worthy of chasing aggressively. Just don't count on another 50-save season. Read Past Outlooks
RANKSFrom Preseason
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$Signed a one-year, $570,800 contract with the Mariners in March of 2018. Traded to the Mets in December of 2018.
Earns 16th save
PNew York Mets
June 21, 2019
Diaz pitched a perfect ninth inning with two strikeouts to earn his 16th save in a 5-4 victory against the Cubs on Friday.
The right-hander induced a flyout and then two strikeouts to end the game on just 12 pitches. It was the efficiency owners wanted to see after Diaz allowed four runs across his last three innings before Friday. He is 1-4 with a 3.64 ERA, 1.31 WHIP and 47 strikeouts in 29.2 innings this season. Diaz is also 16-for-19 in save opportunities.
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Left/Right Pitching Splits
Since 2017
BAA Batters K BB H 2B 3B HR
Since 2017vs Left .172 299 136 33 45 6 1 9
Since 2017vs Right .202 385 124 24 71 10 0 11
2019vs Left .213 51 24 3 10 3 0 3
2019vs Right .304 75 23 5 21 3 0 2
2018vs Left .144 126 68 12 16 1 1 1
2018vs Right .171 154 56 5 25 3 0 4
2017vs Left .184 122 44 18 19 2 0 5
2017vs Right .182 156 45 14 25 4 0 5
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Home/Away Pitching Splits
Since 2017
ERA on Road
ERA at Home
ERA on Road
ERA on Road
Since 2017Home 3.81 1.17 87.1 5 11 47 13.1 3.2 1.4
Since 2017Away 1.65 0.87 81.2 0 3 60 14.7 2.9 0.7
2019Home 3.63 1.21 17.1 1 3 8 14.0 1.6 1.6
2019Away 3.65 1.46 12.1 0 1 8 14.6 3.6 1.5
2018Home 2.45 0.79 40.1 0 4 30 14.5 2.2 0.7
2018Away 1.36 0.79 33.0 0 0 27 16.1 1.9 0.5
2017Home 5.76 1.65 29.2 4 4 9 10.6 5.5 2.4
2017Away 1.24 0.74 36.1 0 2 25 13.4 3.5 0.5
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Stat Review
How does Edwin Diaz compare to other relievers?
This section compares his stats with all relief pitcher seasons from the previous three seasons (minimum 30 innings)*. The bar represents the player's percentile rank. For example, if the bar is halfway across, then the player falls into the 50th percentile for that stat and it would be considered average.

* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against this season's data (min 20 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
  • K/BB
    Strikeout to walk ratio.
  • K/9
    Average strikeouts per nine innings.
  • BB/9
    Average walks per nine innings.
  • HR/9
    Average home runs allowed per nine innings.
  • Fastball
    Average fastball velocity.
  • ERA
    Earned run average. The average earned runs allowed per nine innings.
  • WHIP
    Walks plus hits per inning pitched.
    Batting average on balls in play. Measures how many balls in play against a pitcher go for hits.
  • GB/FB
    Groundball to flyball ratio. The higher the number, the more likely a pitcher is to induce groundballs.
  • Left On Base
    The percentage of base runners that a pitcher strands on base over the course of a season.
  • Exit Velocity
    The speed of the baseball as it comes off the bat, immediately after a batter makes contact.
  • Barrels/BBE
    The percentage of batted ball events resulting in a Barrel. A Barrel is a batted ball with similar exit velocity and launch angle to past ones that led to a minimum .500 batting average and 1.500 slugging percentage.
  • Spin Rate
    Spin Rate is the rate of spin on a baseball after it is released. It is measured in revolutions per minute (rpm).
  • Balls Hit 95+ MPH
    The percentage of batted balls hit that met or exceeded the 95 MPH threshold.
  • Swinging Strike
    The percentage of pitches that result in a swing and a miss.
97.0 mph
Left On Base
Exit Velocity
90.3 mph
Spin Rate
2399 rpm
Balls Hit 95+ MPH
Swinging Strike
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Recent RotoWire Articles Featuring Edwin Diaz
NL FAAB Factor: Waiver Pickups of the Week
10 days ago
He may not be hitting too well of late, but Jan Levine thinks Chris Taylor can turn it around if the Dodgers provide him sufficient playing time.
Minor League Barometer: Risers & Fallers
43 days ago
Jesse Siegel continues with his trip through the minors, leading off with Braves' slugger Austin Riley dominating Triple-A pitching.
Minor League Barometer: Risers & Fallers
57 days ago
Jesse Siegel highlights the risers and fallers in the minors, and none has seen his stock rise as much as Grayson Rodriguez in the early part of the season.
Minor League Barometer: Risers & Fallers
64 days ago
Jesse Siegel is back to update us on the latest prospect talk, including Padres' Hudson Potts and his lack of success early on at Double-A.
NL FAAB Factor: Waiver Pickups of the Week
80 days ago
Jan Levine surveys the free-agent landscape, including the Diamondbacks presenting a few prime add-ons at the plate and an analysis of the Brewers' bullpen battle.
Past Fantasy Outlooks
The road was a bit rocky for Diaz in 2017, with the Mariners temporarily relieving him of closer duties on a couple occasions, but when it was all said and done Diaz tied for fourth in the American League in saves. He converted 21 of 23 save opportunities in the second half and struck out 32 percent of the batters he faced overall using a combination of high-90s fastballs and high-80s sliders. Diaz can be his own worst enemy with the walks, and the uptick in home runs last season is a concern, although he was better in that regard down the stretch (two homers allowed in his final 30.1 innings). His stuff is electric most of the time and there aren't any proven options behind him in the Seattle bullpen, so Diaz should be given every chance to remain in the closer role throughout 2018. However, he's not exactly a "safe" investment given the slip in performance from 2016 and the general year-to-year unpredictability of major-league relievers.
Seattle's save chances were dominated in the first half by Steve Cishek. However, after Cishek landed on the disabled list, Diaz, once a top starting pitching prospect, took the reins and never looked back. He dazzled in the bullpen over the final two-plus months, going 18-for-21 in save chances. Diaz ranked sixth in second-half K/9 (14.3) among arms with 20-plus appearances, behind Ken Giles, Kenley Jansen, Dellin Betances, Craig Kimbrel and Aroldis Chapman. On the season, he finished fourth among relievers with an 18.5 swinging-strike percentage. While his his walk rate was a sparkling 2.6 BB/9, he has bouts of inefficiency and must aim to get ahead in more at-bats. Still, the right-hander, who turns 23 in March, boasts outstanding peripherals (33.6 K-BB%) and electric stuff. Even with some correction perhaps coming, Diaz could deliver numbers befitting a top-five fantasy closer at a discount relative to bigger names.
It is a sad state of affairs when a pitcher who finished the previous season with a 4.57 ERA in 104.1 innings at Double-A has a claim as the best prospect in a farm system, but that is where the Mariners are at. Diaz is not nearly as bad as that ERA suggests — he had a 1.70 ERA in 37 innings at High-A Bakersfield before his promotion and his 3.22 FIP at Double-A Jackson suggests he was pretty unlucky in Southern League play. His 145:46 K:BB in 141.1 innings illustrates his potential to be an average or better bat misser with an average command profile in the big leagues, essentially serving as a true No. 3 starter who should benefit from playing half his games in Safeco Field. Diaz should spend most, if not all of his age-22 season at Triple-A Tacoma, potentially getting some late-season spot starts with the Mariners, but more likely figuring into the rotation plans in 2017.
A third-round pick out of Puerto Rico in the 2012 draft, Diaz held his own at Low-A Clinton last year as a 20-year-old after dominating in rookie ball in 2013. He has a low-to-mid-90s fastball, a good slider, and a developing changeup. His control needs some work, but he has plenty of time to hone those skills. He will also continue to fill out. His 6-foot-2, 178-pound frame is about 20 pounds more than his draft weight, but he's bound to get bigger and stronger still. The organization's co-starting pitcher of the year in 2014 (along with Jordan Pries), Diaz is a ways away, but he has plenty of upside and is worth keeping an eye on.
More Fantasy News
Escapes with 15th save
PNew York Mets
June 15, 2019
Diaz allowed one run on three hits in the ninth inning to earn the save in Saturday's 8-7 win over the Cardinals. He had one strikeout and zero walks.
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Nails down 14th save
PNew York Mets
June 8, 2019
Diaz gave up a hit and struck out two in a scoreless ninth inning Saturday to record his 14th save of the season in a 5-3 win over the Rockies.
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Looking dominant again
PNew York Mets
June 5, 2019
Diaz gave up a hit and struck out the side in a scoreless ninth inning during Tuesday's extra-inning loss to the Giants.
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Unavailable Thursday
PNew York Mets
May 30, 2019
Diaz won't be available to pitch Thursday against the Dodgers due to rest purposes, Tim Britton of The Athletic reports.
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Blows save, takes loss
PNew York Mets
May 30, 2019
Diaz (1-3) took a blown save and loss Wednesday at Dodger Stadium, allowing four runs on five hits and a walk while recording just one out.
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