Zac Gallen

Zac Gallen

28-Year-Old PitcherSP
Arizona Diamondbacks
2023 Fantasy Outlook
For the first time in his career, Gallen avoided the injury bug, logging 31 starts and 184 innings. He recorded a career best 20.3% K-BB% mark, mostly due to a personal best 6.6% walk rate. Gallen's ratios benefited from a .237 BABIP as well as a 9.1% HR/FB mark. However, even if his 2.54 ERA was achieved with a boost from Lady Luck, Gallen's 3.05 FIP, 3.32 xFIP and 3.32 SIERA are all still excellent, softening the landing when the regression monster rears its ugly head. Gallen's pitch mix didn't change, but he threw his four-seam fastball, slider and curveball a little harder, increasing effectiveness so strikeouts should tick up with continued health. Gallen isn't off the injury concern hook but coming off a healthy season merits fantasy anchor consideration. There is a stigma about drafting pitchers from second-division teams, but the Diamondbacks offense is on the upswing, so wins are on the table. Read Past Outlooks
RANKSFrom Preseason
#73
ADP
$Signed a one-year, $5.6 million contract with the Diamondbacks in January of 2023.
Gets back in win column
PArizona Diamondbacks
September 19, 2023
Gallen (16-8) allowed four runs on six hits and three walks while striking out six over five innings to earn the win Tuesday over the Giants.
ANALYSIS
Gallen gave up at least four runs for the fourth time in his last five outings, but he was able to escape with a win this time. The Giants put two runs up in the first inning and another two in the fifth, with two coming via sacrifice fly. Gallen has faltered lately but still has a 3.60 ERA, 1.12 WHIP and 205:44 K:BB through 197.2 innings over a career-high 32 starts this season. He's projected for a favorable road start versus the White Sox early next week.
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Pitching Stats
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2023
2022
2021
2020
2019
2023 MLB Game Log
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2022 MLB Game Log
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2021 MLB Game Log
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2020 MLB Game Log
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2019 MLB Game Log
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Pitching Appearances Breakdown
Average Pitch Count
93
Last 10 Games
97
Last 5 Games
98
How many pitches does Zac Gallen 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 Zac Gallen 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 2021
 
 
-4%
BAA vs LHP
2023
 
 
-6%
BAA vs RHP
2022
 
 
-34%
BAA vs LHP
2021
 
 
-15%
BAA vs RHP
BAA Batters K BB H 2B 3B HR
Since 2021vs Left .214 1004 262 75 196 38 3 26
Since 2021vs Right .224 1030 272 65 211 56 2 30
2023vs Left .247 395 101 26 90 15 1 14
2023vs Right .232 402 102 18 88 25 1 8
2022vs Left .146 338 97 26 45 12 0 7
2022vs Right .222 376 95 21 76 20 1 8
2021vs Left .252 271 64 23 61 11 2 5
2021vs Right .213 252 75 26 47 11 0 14
More Splits View More Split Stats
Home/Away Pitching Splits
Since 2021
 
 
-26%
ERA at Home
2023
 
 
-48%
ERA at Home
2022
 
 
-4%
ERA at Home
2021
 
 
-11%
ERA at Home
ERA WHIP IP W L SV K/9 BB/9 HR/9
Since 2021Home 2.87 1.03 248.0 20 10 0 10.2 2.3 0.9
Since 2021Away 3.88 1.15 255.0 12 12 0 9.0 2.8 1.1
2023Home 2.45 1.01 95.2 12 2 0 10.6 1.6 0.7
2023Away 4.68 1.23 102.0 4 6 0 8.1 2.4 1.3
2022Home 2.49 0.85 90.1 6 1 0 9.0 2.1 0.6
2022Away 2.59 0.97 93.2 6 3 0 9.8 2.5 0.9
2021Home 4.06 1.31 62.0 2 7 0 11.3 3.5 1.7
2021Away 4.55 1.28 59.1 2 3 0 9.3 3.8 1.1
More Splits View More Split Stats
Stat Review
How does Zac Gallen compare to other starting pitchers?
This section compares his stats with all starting pitcher seasons from the previous three seasons (minimum 120 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 120 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
4.66
 
K/9
9.3
 
BB/9
2.0
 
HR/9
1.0
 
Fastball
93.6 mph
 
ERA
3.60
 
WHIP
1.12
 
BABIP
.307
 
GB/FB
1.33
 
Left On Base
71.7%
 
Exit Velocity
84.9 mph
 
Barrels/BBE
5.5%
 
Spin Rate
2219 rpm
 
Balls Hit 95+ MPH
28.5%
 
Swinging Strike
11.3%
 
Prospect Rankings History
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 Zac Gallen See More
Weekly Pitcher Rankings: Start Me Up
5 days ago
Todd Zola rocks and fires with his Weekly Pitcher Rankings, including a two-start week for Milwaukee's Freddy Peralta.
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8 days ago
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MLB DFS Picks: FanDuel Plays and Strategy for Wednesday, Sept. 13
8 days ago
Chris Morgan checks out Wednesday's slate as Cy Young candidate Zac Gallen heads to New York to take on the Mets.
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12 days ago
Todd Zola rocks and fires with his Weekly Pitcher Rankings, including a two-start Brandon Woodruff at the top of the rankings.
The Z Files: Underdog Fantasy Playoff Best Ball Rankings
15 days ago
Todd Zola reviews Underdog's new playoff best-ball leagues, where the runaway success of Atlanta and Ronald Acuna in the regular season may actually hurt their value to your roster.
Past Fantasy Outlooks
2022
2021
2020
Gallen endured an injury-riddled first half, beginning with a hairline fracture in his right arm initially thought to be more serious, followed by a sprained right elbow and hamstring strain. He headed into the break with only nine starts. Gallen gathered 14 in the second half, registering a 4.37 ERA and 1.24 WHIP with 90 punch outs in 80.1 innings, but he also walked 18 and surrendered 14 homers in that span. Eight of the homers came on a slider or changeup. Together, he threw those secondary offerings only one-third of the time, so the home run surplus seems more fluky than worrisome. Gallen is still just 26-years-old, so there's plenty of time to regain near-ace status. Last season's injuries provide pause, and his availability for Opening Day is in question due to some offseason shoulder issues. Gallen isn't expected to miss much time if any, but it remains a concern coming off the 2021 injuries If helium floated Gallen out of your range the past couple of seasons, the price is right to get back in, assuming he's healthy.
The Marlins have a good corps of starters, but it looks like they may have let an ace get away when they traded Gallen to Arizona at the 2019 trade deadline. Gallen has been one of the most effective starting pitchers in the game since he broke into the majors that season. A third-round pick in 2016, Gallen has faced 625 batters in the big leagues and pitched to a 2.78 ERA, 1.17 WHIP and 178:61 K:BB. He has a balanced pitch mix, utilizing his four-seamer, cutter, curveball and changeup all at least 16% of the time. His cutter has good horizontal break, his changeup has good downward movement and he can command the ball well in and around the zone. The ERA estimators suggest some performance giveback is imminent and it is best to count on some, though Gallen has routinely outperformed his estimators in pro ball. Remember Chase Field has become a pitchers' park since the humidor was installed.
Gallen impressed in his first glimpse of major-league action with the Marlins last season and was surprisingly traded to the Diamondbacks at the end of July. While the deal means that Gallen is now pitching in the stronger NL West, he also has a more productive offense powering him and a much better defense behind him. Although the right-hander only throws his fastball 92.9 mph on average, he has three strong secondary pitches and plus command. The 24-year-old posted a career-high 171.1 innings between the majors and minors last year before being shut down at the end of September, so workload should not be a major concern for 2020. Gallen may not overpower hitters with his velocity, but he can rack up strikeouts and the ingredients are there for him to take a leap. The hype train has already left the station, however, so know you're going to have to pay full freight if you want to go along for the ride.
More Fantasy News
Mauled by Mets
PArizona Diamondbacks
September 14, 2023
Gallen (15-8) took the loss against the Mets on Wednesday, allowing seven runs (six earned) on eight hits and two walks while striking out four batters over five innings.
ANALYSIS
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Tosses shutout in Chicago
PArizona Diamondbacks
September 8, 2023
Gallen (15-7) threw nine scoreless innings and struck out nine in Friday's 1-0 win over the Cubs. He allowed three hits and one walk.
ANALYSIS
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Another rough start
PArizona Diamondbacks
September 3, 2023
Gallen (14-7) allowed five runs on eight hits and a walk while striking out four over 5.1 innings, taking the loss Sunday versus the Orioles.
ANALYSIS
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Stumbles versus Dodgers
PArizona Diamondbacks
August 28, 2023
Gallen (14-6) allowed six runs on nine hits and three walks while striking out three over 5.1 innings to take the loss Monday versus the Dodgers.
ANALYSIS
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Strikes out 11 in win
PArizona Diamondbacks
August 22, 2023
Gallen (14-5) allowed a run on seven hits and a walk while striking out 11 over six innings to earn the win in Tuesday's 6-3 victory over the Rangers.
ANALYSIS
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