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.
May be unavailable Friday
PNew York Mets
May 24, 2019
Diaz may not be available to pitch Friday against the Tigers after throwing in three of the last four games, Anthony DiComo of MLB.com reports.
Manager Mickey Callaway didn't explicitly ruled Diaz out, but it sounds as though he may be more of a last-resort option. Drew Gagnon could apparently garner a look should a save situation arise Friday.
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Left/Right Pitching Splits
Since 2017
BAA Batters K BB H 2B 3B HR
Since 2017vs Left .151 274 128 31 36 3 1 7
Since 2017vs Right .190 363 115 23 63 8 0 11
2019vs Left .040 26 16 1 1 0 0 1
2019vs Right .271 53 14 4 13 1 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 on Road
ERA on Road
ERA on Road
Since 2017Home 3.67 1.10 81.0 5 10 44 12.9 3.2 1.6
Since 2017Away 1.27 0.82 78.0 0 2 59 14.7 2.9 0.5
2019Home 2.45 0.73 11.0 1 2 5 13.1 0.8 2.5
2019Away 1.04 1.27 8.2 0 0 7 14.5 4.2 0.0
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.
96.8 mph
Left On Base
Exit Velocity
90.4 mph
Spin Rate
2435 rpm
Balls Hit 95+ MPH
Swinging Strike
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Defensive Stats
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Recent RotoWire Articles Featuring Edwin Diaz
Minor League Barometer: Risers & Fallers
11 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
25 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
32 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
48 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.
Mound Musings: Endgame Odyssey Update
58 days ago
Brad Johnson updates potential pitching opportunities and reviews bullpens with continued question marks, including where free agent Craig Kimbrel could land.
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
Notches 12th save
PNew York Mets
May 23, 2019
Diaz didn't allow a baserunner and struck out two across a scoreless ninth inning to record the save Thursday against the Nationals.
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Nails down 11th save
PNew York Mets
May 20, 2019
Diaz gave up a hit in a scoreless ninth inning to record his 11th save of the season in Monday's 5-3 win over the Nationals.
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Secures 10th save
PNew York Mets
May 11, 2019
Diaz notched his 10th save of the year with a scoreless ninth inning Saturday versus the Marlins. He allowed one hit with one strikeout and one walk.
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Escapes with ninth save
PNew York Mets
May 8, 2019
Diaz recorded his ninth save of the season in Tuesday's 7-6 win over the Padres, giving up one run on two hits and two walks over one inning while striking out two.
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Not available Tuesday
PNew York Mets
April 30, 2019
Diaz won't be available to pitch Tuesday night due to rest purposes, Anthony DiComo of MLB.com reports.
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