Edwin Diaz
Edwin Diaz
27-Year-Old PitcherRP
New York Mets
2021 Fantasy Outlook
Diaz's 2019 campaign, which saw his ERA spike from 1.96 to 5.59, served as a valuable reminder that even the best relievers in baseball aren't particularly reliable from season to season. The righty looked like he was in line for another disappointing season at the start of last year, when he allowed runs in two of his first three appearances. He allowed just three total earned runs the rest of the way, however, finishing the year with a stellar 1.75 ERA, a number he backed up with a career-high 45.5 K%. It wasn't all positive for his fantasy profile, however, as his early struggles combined with his poor 2019 season meant he was removed from the closer role for most of the year and wound up finishing with just six saves. While he may not have his manager's full faith heading into 2021, he's clearly closer material most of the time, making him a risky but very high-ceiling option during draft season. Read Past Outlooks
RANKSFrom Preseason
#76
ADP
$Signed a one-year, $7 million contract with the Mets in January of 2021.
Earns second save
PNew York Mets
April 18, 2021
Diaz allowed a hit in a scoreless ninth inning Sunday and earned a save over the Rockies.
ANALYSIS
It took Diaz a while to notch his first save, but he picked up two against Colorado this weekend. After Trevor Story knocked a two-out single, he was caught stealing to secure the game for the Mets. Diaz now owns a 3.18 ERA and 7:2 K:BB through 5.2 frames.
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Pitching Stats
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2021
2020
2019
2018
2017
2021 MLB Game Log
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2020 MLB Game Log
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2019 MLB Game Log
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2018 MLB Game Log
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2017 MLB Game Log
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Pitching Appearances Breakdown
Average Pitch Count
13
Last 10 Games
13
Last 5 Games
12
How many pitches does Edwin Diaz generally throw?
 
1-10
 
11-20
 
21-30
 
31-40
 
41-50
 
51-60
 
61-70
 
71-80
 
81-90
 
91-100
 
101-110
 
111-120
 
121+
 
1-10
 
11-20
 
21-30
 
31-40
 
41-50
 
51-60
 
61-70
 
71-80
 
81-90
 
91-100
 
101-110
 
111-120
 
121+
 
1-10
 
11-20
 
21-30
 
31-40
 
41-50
 
51-60
 
61-70
 
71-80
 
81-90
 
91-100
 
101-110
 
111-120
 
121+
What part of the game does Edwin Diaz generally pitch?
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
% Games Reaching Innings Threshold
% Games By Number of Innings Pitched
Left/Right Pitching Splits
Since 2019
 
 
-39%
BAA vs LHP
2021
 
 
-100%
BAA vs LHP
2020
 
 
-33%
BAA vs LHP
2019
 
 
-35%
BAA vs LHP
BAA Batters K BB H 2B 3B HR
Since 2019vs Left .170 160 71 23 23 4 0 6
Since 2019vs Right .279 219 83 15 55 9 0 11
2021vs Left .000 7 3 1 0 0 0 0
2021vs Right .286 15 4 1 4 1 0 0
2020vs Left .146 51 23 9 6 1 0 1
2020vs Right .217 52 25 5 10 1 0 1
2019vs Left .193 102 45 13 17 3 0 5
2019vs Right .299 152 54 9 41 7 0 10
More Splits View More Split Stats
Home/Away Pitching Splits
Since 2019
 
 
-7%
ERA at Home
2021
 
 
-100%
ERA on Road
2020
 
 
-36%
ERA at Home
2019
 
 
-5%
ERA at Home
ERA WHIP IP W L SV K/9 BB/9 HR/9
Since 2019Home 4.17 1.25 49.2 4 4 17 15.0 3.3 1.6
Since 2019Away 4.50 1.42 38.0 1 4 16 16.8 4.7 1.9
2021Home 4.91 1.36 3.2 1 0 0 9.8 4.9 0.0
2021Away 0.00 0.50 2.0 0 0 2 13.5 0.0 0.0
2020Home 1.23 1.30 14.2 1 0 3 16.6 5.5 0.6
2020Away 1.93 1.18 9.1 1 1 2 20.3 4.8 1.0
2019Home 5.46 1.21 31.1 2 4 14 14.9 2.0 2.3
2019Away 5.74 1.58 26.2 0 3 12 15.9 5.1 2.4
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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 2019 data (min 30 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.
  • BABIP
    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.
K/BB
3.50
 
K/9
11.1
 
BB/9
3.2
 
HR/9
0.0
 
Fastball
98.7 mph
 
ERA
3.18
 
WHIP
1.06
 
BABIP
.308
 
GB/FB
1.25
 
Left On Base
66.7%
 
Exit Velocity
80.5 mph
 
Barrels/BBE
0.0%
 
Spin Rate
2298 rpm
 
Balls Hit 95+ MPH
5.3%
 
Swinging Strike
15.0%
 
Advanced Pitching Stats
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Defensive Stats
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Stats Vs Today's Lineup
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Recent RotoWire Articles Featuring Edwin Diaz
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16 days ago
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25 days ago
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26 days ago
Todd Zola takes a look at pitchers who could benefit if MLB's new ball does curtail homers and finds some support for Lucas Giolito's rise up draft boards.
Past Fantasy Outlooks
2020
2019
2018
2017
2016
2015
Diaz struck out 39% of the hitters he faced in 2019 and had a 30 K-BB%, both of which are elite rates for any relief pitcher. The problem was what happened with the other 61% of hitters he faced last season. Despite having both velocity and a strikeout rate in the 99th percentile last season, Diaz was in the second percentile of hard-hit rate and the 11th percentile of exit velocity by batters. Those type of outcomes are what drove his .281 BABIP from his record-breaking 2018 season up to .377 this past season. Both his fastball and slider had negative run values for the first time in his career, and that mainly came from his inconsistent command of both pitches. Diaz's struggles were a great reminder of two things: reliever volatility, and the difference between command and control. He threw strikes, but not where they needed to be. Elite seasons are often followed up by steps backward. Jump back in on Diaz.
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.
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 first save
PNew York Mets
April 17, 2021
Diaz struck out the side in a perfect seventh inning Saturday to record his first save of the season in the first game of a doubleheader against the Rockies.
ANALYSIS
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Stumbles in non-save situation
PNew York Mets
April 10, 2021
Diaz gave up two runs on three hits and a walk over two-thirds of an inning during Saturday's 3-0 loss to the Marlins.
ANALYSIS
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Earns win
PNew York Mets
April 8, 2021
Diaz (1-0) worked around a walk and struck out one in a scoreless inning to earn the win Thursday against the Marlins.
ANALYSIS
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No issues this spring
PNew York Mets
March 21, 2021
Diaz has given up only two hits and no earned runs over four Grapefruit League innings with a 6:0 K:BB.
ANALYSIS
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No official closer tag
PNew York Mets
February 23, 2021
Diaz expects to close games for the Mets this season, though the team hasn't named an official closer and may not do so, Anthony DiComo of MLB.com reports.
ANALYSIS
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