Spencer Arrighetti

Spencer Arrighetti

25-Year-Old PitcherSP
Houston Astros
2025 Fantasy Outlook
Arrighetti's rookie season had a little bit of everything for everyone, including his fans and his detractors. He had four different contests in which he struck out 10 or more batters, capped off by a 13 strikeout performance against Boston. Four other times, he allowed five or more earned runs, including seven in just 1.1 innings against Detroit. He twice allowed three homers in a contest, and yet struck out 27.1 percent of the batters he faced. However, it was that inconsistency that led to him winning just seven of his 28 starts for a team that won its division. The rookie lived and died off his curveball and sweeper, which collectively held opposing hitters to a .151 batting average, while the league hit .296 off the rest of his offerings. Arrighetti showed signs of progress in the second half, as three of the four aforementioned big strikeout games came after the break, and a reduction in his walk rate helped reduce his ERA two and a half runs from the first half. As long as his nonbreaking pitches are this hittable, homers will continue to be an issue for him in Houston, but reducing the walks can help offset some of that damage. That 21.4 percent K-BB percentage in the second half of the season is something to admire since his overall numbers somewhat mask that late-season goodness. Read Past Outlooks
RANKS
From Preseason
$Signed a one-year contract with the Astros in April of 2024.
Working on two-seam fastball
PHouston Astros
March 13, 2025
Arrighetti is working on a new two-seam fastball against right-handed hitters this spring, because his four-seam fastball last year was hit hard, Brian McTaggart of MLB.com reports. He only threw the new pitch three times in his last start against the Cardinals, because they had six left-handed batters.
ANALYSIS
The four-seam fastball got hit to the tune of a .302 batting average and .516 slugging percentage last year over 145.0 regular-season innings, hence the need for a new offering. "[I want to] throw something hard that doesn't get barrelled," he said. "Simply put." The new pitch is still a work in progress for Arrighetti, who already gets good results on his offspeed offerings.
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Pitching Stats
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2024
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Pitching Appearances Breakdown
Average Pitch Count
86
Last 10 Games
85
Last 5 Games
73
How many pitches does Spencer Arrighetti 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 Spencer Arrighetti 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 2022
 
 
-8%
BAA vs LHP
2024
 
 
-8%
BAA vs LHP
2023
No Stats
2022
No Stats
BAA Batters K BB H 2B 3B HR
Since 2022vs Left .240 339 100 43 70 17 1 9
Since 2022vs Right .260 292 71 22 69 15 0 12
2024vs Left .240 339 100 43 70 17 1 9
2024vs Right .260 292 71 22 69 15 0 12
2023vs Left 0 0 0 0 0 0 0 0
2023vs Right 0 0 0 0 0 0 0 0
2022vs Left 0 0 0 0 0 0 0 0
2022vs Right 0 0 0 0 0 0 0 0
More Splits View More Split Stats
Home/Away Pitching Splits
Since 2022
 
 
-18%
ERA at Home
2024
 
 
-18%
ERA at Home
2023
No Stats
2022
No Stats
ERA WHIP IP W L SV K/9 BB/9 HR/9
Since 2022Home 4.06 1.24 68.2 3 5 0 10.9 3.1 1.4
Since 2022Away 4.95 1.56 76.1 4 8 0 10.4 4.8 1.2
2024Home 4.06 1.24 68.2 3 5 0 10.9 3.1 1.4
2024Away 4.95 1.56 76.1 4 8 0 10.4 4.8 1.2
2023Home 0 0 0 0 0 0 0 0 0
2023Away 0 0 0 0 0 0 0 0 0
2022Home 0 0 0 0 0 0 0 0 0
2022Away 0 0 0 0 0 0 0 0 0
More Splits View More Split Stats
Stat Review
How does Spencer Arrighetti 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
2.63
 
K/9
10.6
 
BB/9
4.0
 
HR/9
1.3
 
Fastball
94.2 mph
 
ERA
4.53
 
WHIP
1.41
 
BABIP
.332
 
GB/FB
1.04
 
Left On Base
71.0%
 
Exit Velocity
81.3 mph
 
Barrels/BBE
4.3%
 
Spin Rate
2420 rpm
 
Balls Hit 95+ MPH
21.4%
 
Swinging Strike
12.5%
 
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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2024 Fantasy Outlook
Thrust into the big-league rotation early in 2024 amid a slew of injuries, Arrighetti looks more like a streamer in very good matchups than an every-week consideration in mixed leagues. He was 93-97 mph with his fastball in his big-league debut but had sat in the low-90s in the minors, so perhaps he was a little juiced up. Arrighetti's high-80s cutter and low-80s sweeper are his go-to secondary offerings, with the sweeper grading as his best pitch. The 24-year-old righty has poor command, with his 9.1 percent walk rate at Double-A in 2023 the lone mark below 11 percent at any stop since 2022. He has gone fewer than five innings in all three of his 2024 starts, largely due to the fact he has walked 10 batters in 11.1 innings. If the Astros start getting starters back from the injured list, Arrighetti could head back to Triple-A or move into a long-relief role.
More Fantasy News
Mixed results in spring starts
PHouston Astros
March 1, 2025
Arrighetti recorded two shutout innings while striking out three and not allowing a baserunner in Saturday's Grapefruit League game.
ANALYSIS
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Available out of bullpen
PHouston Astros
September 27, 2024
Arrighetti (calf) will pitch out of the bullpen for the weekend series against the Guardians, Chandler Rome of The Athletic reports.
ANALYSIS
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Dealing with calf cramping
PHouston Astros
Calf
September 22, 2024
Arrighetti said after Sunday's game against the Angels that his calf started cramping during the sixth inning, Chandler Rome of The Athletic reports.
ANALYSIS
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Takes low-scoring loss
PHouston Astros
September 16, 2024
Arrighetti (7-13) allowed two runs on eight hits and a walk while striking out three over five innings, taking the loss versus the Padres on Monday.
ANALYSIS
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Bounces back with no-decision
PHouston Astros
September 10, 2024
Arrighetti allowed two runs on seven hits and a walk while striking out seven over 6.2 innings in a no-decision versus the Athletics on Tuesday.
ANALYSIS
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Latest Fantasy Rumors
Top AL rookie in August
PHouston Astros
September 4, 2024
Arrighetti was named the American League Rookie of the Month for August on Tuesday.
ANALYSIS
The rookie right-hander was inconsistent through his first 19 big-league starts as he closed July with a 5.58 ERA through 92 innings, but he got on track in August and posted a 1.95 ERA, 0.90 WHIP and 47:10 K:BB across 32.1 innings. Arrighetti had a 3-2 record during the month but posted double-digit strikeouts in three of his five starts. The 24-year-old should stick in the rotation for the rest of the season, with Ronel Blanco likely to move to the bullpen for the stretch run. A strong finish could have Arrighetti in the mix to make postseason starts, though right now he may be on the outside looking in for a pared-down playoff rotation.
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