Jairo Diaz
Jairo Diaz
28-Year-Old PitcherRP
Colorado Rockies
2019 Fantasy Outlook
There was no outlook written for Jairo Diaz in 2019. Check out the latest news below for more on his current fantasy value.
RANKSFrom Preseason
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$Signed a one-year, minor-league contract with the Rockies in January of 2019.
Earns extra-inning win
PColorado Rockies
September 28, 2019
Diaz (6-4) tossed a perfect 10th inning and earned the win in Saturday's 3-2 triumph over the Brewers.
ANALYSIS
Diaz did his part in the top of the tenth, and Trevor Story made him a winner with a walkoff homer. Diaz owns a 4.53 ERA and 1.30 WHIP with five saves and seven holds in 57.2 innings this year.
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Pitching Stats
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Pitching Appearances Breakdown
Average Pitch Count
16
Last 10 Games
17
Last 5 Games
19
How many pitches does Jairo 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 Jairo 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 2017
 
 
-21%
BAA vs LHP
2019
 
 
-23%
BAA vs LHP
2018
No Stats
2017
Even Split
BAA Batters K BB H 2B 3B HR
Since 2017vs Left .241 126 27 14 27 6 1 2
Since 2017vs Right .304 149 38 10 41 9 3 5
2019vs Left .216 115 25 13 22 6 0 2
2019vs Right .281 130 38 6 34 7 3 5
2018vs Left 0 0 0 0 0 0 0 0
2018vs Right 0 0 0 0 0 0 0 0
2017vs Left .500 11 2 1 5 0 1 0
2017vs Right .500 19 0 4 7 2 0 0
More Splits View More Split Stats
Home/Away Pitching Splits
Since 2017
 
 
-1%
ERA on Road
2019
 
 
-26%
ERA on Road
2018
No Stats
2017
 
 
-83%
ERA at Home
ERA WHIP IP W L SV K/9 BB/9 HR/9
Since 2017Home 4.91 1.53 36.2 5 2 3 8.8 2.9 1.2
Since 2017Away 4.85 1.38 26.0 1 2 2 10.0 4.2 0.7
2019Home 5.08 1.46 33.2 5 2 3 9.6 2.7 1.3
2019Away 3.75 1.08 24.0 1 2 2 10.1 3.4 0.8
2018Home 0 0 0 0 0 0 0 0 0
2018Away 0 0 0 0 0 0 0 0 0
2017Home 3.00 2.33 3.0 0 0 0 0.0 6.0 0.0
2017Away 18.00 5.00 2.0 0 0 0 9.0 13.5 0.0
More Splits View More Split Stats
Stat Review
How does Jairo 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
3.32
 
K/9
9.8
 
BB/9
3.0
 
HR/9
1.1
 
Fastball
97.0 mph
 
ERA
4.53
 
WHIP
1.30
 
BABIP
.330
 
GB/FB
2.03
 
Left On Base
62.9%
 
Exit Velocity
90.1 mph
 
Barrels/BBE
5.3%
 
Spin Rate
2248 rpm
 
Balls Hit 95+ MPH
43.4%
 
Swinging Strike
14.4%
 
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 Jairo Diaz
NL FAAB Factor: Waiver Pickups of the Week
35 days ago
In this edition, Jan Levine focuses on those players who have recently been called up, have returned to the lineup, or are slated to be back soon.
NL FAAB Factor: Waiver Pickups of the Week
49 days ago
As we await expanded rosters, Jan Levine looks at the latest available NL candidates while mentioning a few who could stick for the rest of the regular season.
Mound Musings: Seeking a Blueprint for Pitching Success
52 days ago
Brad Johnson takes a crack at identifying the characteristics of pitching success in this era of the homer, which includes closely observing guys like veteran ace Justin Verlander.
NL FAAB Factor: Waiver Pickups of the Week
56 days ago
Despite some offensive hiccups this season, Jan Levine believes Harrison Bader's recent form will keep him seeing plenty of action.
Mound Musings: See You in September?
59 days ago
Brad Johnson runs down a list of arms who could help in the fantasy season’s final month or who might be deserving of your attention next spring, starting with Giants pitcher Johnny Cueto.
Past Fantasy Outlooks
2017
2016
2015
Diaz impressed in his first cup of coffee with the Rockies in 2015, raising hope that he could become a major cog in the bullpen very quickly. Those plans were quickly sidetracked, however, after he tore the UCL in his right elbow early in spring training, keeping him out for the entirety of the 2016 campaign. The right-hander's rehab seems to be going as scheduled, and considering the fact that his Tommy John surgery occurred so early in 2016, there's a decent chance he'll be ready to go by midseason. Diaz is only 25 years old, so if he can continue to throw in the upper-90s following the surgery and operate at the high level he displayed at the end of 2015, he could work his way into a prominent back-end role.
After being acquired in December in a trade with the Angels, Diaz was sent to Triple-A after struggling in spring training. He pitched decently with the Isotopes, but he really came into his own once he was called up to the majors in August. In 19 innings, the right-hander had a 2.37 ERA and a 1.16 WHIP with 18 strikeouts. He also was used more in high-leverage situations later in the season. Diaz appears to have gained the trust of manager Walt Weiss, and if he can continue to pitch as well as he did at the end of 2015, the 24-year-old should be a major part of the Rockies' bullpen plans this year and in the future.
Diaz got the call to make his major league debut in September after excelling at Double-A Arkansas, posting a 2.20 ERA with a 48:10 K:BB ratio in 32.2 innings. His success continued in his cup of coffee with the big club in the final month, as he notched a 3.18 ERA in 5.2 frames. Diaz has been finding his strikeout pitch the last two seasons, which is exactly what you want to see from a 23-year-old who can exceed 97 mph with his fastball. He also kept his walk rate below 3.0 BB/9 in 64.2 innings split between High-A Inland Empire and Arkansas last season. Diaz might be a long shot to earn an Opening Day roster spot in 2015, but he'll have a slightly clearer path to the big leagues after being acquired by the Rockies via trade in December.
More Fantasy News
Perfect inning for fifth save
PColorado Rockies
September 21, 2019
Diaz pitched a perfect ninth inning, striking out two, to earn his fifth save of the season in Saturday's 4-2 win over the Dodgers.
ANALYSIS
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Nabs fourth save
PColorado Rockies
September 14, 2019
Diaz gave up a hit and struck out one in a scoreless ninth inning Friday to record his fourth save of the season in a 10-8 win over the Padres.
ANALYSIS
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Records third save
PColorado Rockies
September 11, 2019
Diaz earned the save against the Cardinals on Wednesday, firing a scoreless ninth inning while allowing one hit and striking out one.
ANALYSIS
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Picks up second save
PColorado Rockies
September 10, 2019
Diaz picked up the save against the Cardinals on Tuesday, tossing two scoreless innings to close out Colorado's 2-1 victory. He struck out two and walked none.
ANALYSIS
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Earns first save
PColorado Rockies
September 6, 2019
Diaz picked up the save against the Padres on Friday after tossing a scoreless ninth frame with one strikeout.
ANALYSIS
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