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Luis Guerrero

Luis Guerrero

25-Year-Old PitcherRP
Boston Red Sox AAA
2025 Stats
W-L
0-1
ERA
4.15
WHIP
1.33
K
10
SV
0
2026 Projections
W-L
ERA
WHIP
K
SV
Unlock Our Projections
2025 Fantasy Outlook
There was no outlook written for Luis Guerrero in 2025. Check out the latest news below for more on his current fantasy value.
League AAA
Bats R
Throws R
40 Man No
Height 6'0"
Weight 215
DOB 8/5/2000
Drafted 17th Rd 2021
Signed a one-year contract with the Red Sox in March of 2025.
Outrighted to Triple-A
PBoston Red Sox  AAA
November 13, 2025
The Red Sox outrighted Guerrero to Triple-A Worcester on Thursday, Chris Cotillo of MassLive.com reports.
Analysis
Guerrero had been designated for assignment last week, and he will remain in the organization after somewhat surprisingly clearing waivers. The hard-throwing reliever has posted a 2.63 ERA but a problematic 19:16 K:BB across 27.1 frames covering parts of two major-league seasons.
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Pitching Stats
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2025 MLB Game Log
2025
2024
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Scoring
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Minor League Game Log
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Pitching Appearances Breakdown
Average Pitch Count
22
Last 10 Games
25
Last 5 Games
18
How many pitches does Luis Guerrero 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 Luis Guerrero 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 2023
 
 
-60%
BAA vs RHP
2025
 
 
-68%
BAA vs RHP
2024
 
 
-40%
BAA vs RHP
2023
No Stats
BAA Batters K BB H 2B 3B HR
Since 2023vs Left .250 47 5 6 10 2 0 0
Since 2023vs Right .100 61 14 10 5 2 0 0
2025vs Left .273 29 2 6 6 2 0 0
2025vs Right .086 43 8 8 3 1 0 0
2024vs Left .222 18 3 0 4 0 0 0
2024vs Right .133 18 6 2 2 1 0 0
2023vs Left 0 0 0 0 0 0 0 0
2023vs Right 0 0 0 0 0 0 0 0
Home/Away Pitching Splits
Since 2023
 
 
-53%
ERA on Road
2025
 
 
-47%
ERA on Road
2024
No Stats
2023
No Stats
ERA WHIP IP W L SV K/9 BB/9 HR/9
Since 2023Home 3.38 1.31 16.0 0 0 0 3.4 5.6 0.0
Since 2023Away 1.59 0.88 11.1 0 1 0 10.3 4.8 0.0
2025Home 5.06 1.59 10.2 0 0 0 2.5 8.4 0.0
2025Away 2.70 0.90 6.2 0 1 0 9.5 5.4 0.0
2024Home 0.00 0.75 5.1 0 0 0 5.1 0.0 0.0
2024Away 0.00 0.86 4.2 0 0 0 11.6 3.9 0.0
2023Home 0 0 0 0 0 0 0 0 0
2023Away 0 0 0 0 0 0 0 0 0
Minor League Left/Right Pitching Splits (AAA)
Since 2023
 
 
-15%
BAA vs RHP
2025
 
 
-6%
BAA vs LHP
2024
 
 
-28%
BAA vs RHP
2023
 
 
-33%
BAA vs LHP
BAA Batters K BB H 2B 3B HR
Since 2023vs Left .210 169 44 30 29 2 1 7
Since 2023vs Right .178 211 67 26 31 2 0 5
2025vs Left .170 53 9 6 8 1 0 3
2025vs Right .180 63 14 11 9 0 0 2
2024vs Left .235 106 31 20 20 1 1 3
2024vs Right .170 133 48 12 19 2 0 3
2023vs Left .167 10 4 4 1 0 0 1
2023vs Right .250 15 5 3 3 0 0 0
Stat Review
How does Luis Guerrero 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
0.71
 
K/9
5.2
 
BB/9
7.3
 
HR/9
0.0
 
Fastball
96.5 mph
 
ERA
4.15
 
WHIP
1.33
 
BABIP
.188
 
GB/FB
1.29
 
Left On Base
65.2%
 
Exit Velocity
82.7 mph
 
Barrels/BBE
6.9%
 
Spin Rate
2241 rpm
 
Balls Hit 95+ MPH
25.0%
 
Swinging Strike
12.5%
 
Advanced Pitching Stats
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Defensive Stats
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Stats Vs Today's Lineup
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Red Sox Depth Chart
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More Fantasy News
Designated for assignment
PBoston Red Sox  AAA
November 6, 2025
The Red Sox activated Guerrero from the 60-day injured list and designated him for assignment Thursday, Chris Cotillo of MassLive.com reports.
Analysis
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Initiates rehab assignment
PBoston Red Sox  AAA
Elbow
August 28, 2025
Guerrero (elbow) began a rehab assignment with High-A Greenville on Tuesday and worked around three walks and one hit in a scoreless inning in his first appearance.
Analysis
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Nearing rehab assignment
PBoston Red Sox  AAA
Elbow
August 24, 2025
Guerrero (elbow) threw a 25-pitch live batting practice session Aug. 12 and could soon head out on a rehab assignment, MLB.com reports.
Analysis
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Shifts to 60-day IL
PBoston Red Sox  AAA
Elbow
August 2, 2025
The Red Sox transferred Guerrero (elbow) from the 15-day injured list to the 60-day IL on Saturday.
Analysis
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Lands on IL with elbow strain
PBoston Red Sox  AAA
Elbow
June 28, 2025
The Red Sox placed Guerrero on the 15-day injured list Saturday due to a right elbow strain.
Analysis
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Latest Fantasy Rumors
Could debut in 2024
PBoston Red Sox  AAA
April 15, 2024
Jim Callis of MLB.com speculates that Guerrero could contribute in Boston's bullpen at some point in 2024.
Analysis
Guerrero recently entered the Red Sox's Top 30 prospects, per MLB Pipeline, which was well earned after he posted a 1.81 ERA in 43 outings at Double-A Portland last season. The 23-year-old righty move up to Triple-A Worcester late last year and is back there to begin 2024, and he's off to a solid start with two runs allowed and a 5:2 K:BB over 4.2 innings.
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