| IP | 113.2 |
|---|---|
| ERA | 3.88 |
| WHIP | 1.350 |
| BB/9 | 6.2 |
| SO/9 | 10.4 |
- Full name Miguel Daniel Ullola
- Born 06/19/2002 in Puerto Plata, Dominican Republic
- Profile Ht.: 6'1" / Wt.: 205 / Bats: R / Throws: R
Top Rankings
Organization Prospect Rankings
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BA Grade/Risk: 50/High.
Track Record: The Astros signed Ullola for $75,000 out of the Dominican Republic in January 2021. He moved quickly by reaching the Florida Complex League later that season. Ullola made his full-season debut with Low-A Fayetteville in 2022, enjoying a breakout season with a 3.25 ERA in 72 innings. He struggled in 2023 at High-A Asheville, where his hitter-friendly home park made for a forgettable season. He handled the jump to Double-A with ease in 2024. Ullola made 23 starts with a 4.24 ERA and 166 strikeouts over 127.1 innings while posting the lowest walk rate of his career. He made one start following a promotion to Triple-A Sugar Land.
Scouting Report: A young righthander with premium stuff but very fringy command, Ullola has been able to hold on as a starter. He has free-and-easy mechanics, moderate arm action length and releases the ball from a high three-quarters slot. Ullola gets above-average extension with a lower release height that generates ride and a flatter plane to the plate. Ullola’s fastball sits 93-95 mph and peaks at 98 with some cut and 18-20 inches of induced vertical break. His fastball is plus-plus and generates swing-and-miss at an elite rate. Ullola’s primary secondary is his slider with cutter shape that sits 87-88 mph, touches 90 and has been marked both as a slider and cutter by ball-tracking systems. It’s a solid bat-misser that generates weak contact. Ullola also mixes a low-80s curveball and an upper-80s changeup. Both pitches see increased usage against lefthanded hitters. Ullola’s command is still below-average, but he improved his strike-throwing to fringe-average in 2024 with accompanying results.
The Future: If Ullola can hold the fringe-average control he did in 2024, he has a chance to break through as a high-strikeout, five-and-dive starter. If not, his stuff would play in high-leverage relief.
Scouting Grades: Fastball: 70 | Curveball: 45 | Slider: 55 | Changeup: 40 | Control: 45.
Scouting Grades: Fastball: 70 | Curveball: 45 | Slider: 55 | Changeup: 40 | Control: 45. -
BA Grade: 50/Extreme
Track Record: The Astros signed Ullola as an 18-year-old, then moved him quickly. He split his first season between the Dominican Summer League and the Rookie-level Florida Complex League, racking up 38 strikeouts in 24.1 innings. He made his full-season debut in 2022 and has moved a level a year for the past two seasons. Ullola made the jump to High-A in 2023. He made 25 appearances for Asheville but struggled with command and allowed too many home runs. Ullola improved his strike-throwing throughout the season, cutting his walk rate by a third from July 1 forward.
Scouting Report: Ullola’s explosive fastball leads his arsenal and rates as the best in the system. The pitch is a classic four-seamer, sitting 93-94 mph and touching 95 at peak with heavy ride and a tough angle when located at the top of the zone. Ullola shows fringy command of the pitch, but it will generate whiffs in-zone when located. His primary secondary is a mid-80s slider with gyro shape and some late cut. The slider doesn’t miss many bats but Ullola has shown average command of the pitch. Ullola also throws an upper-70s curveball with two-plane break but his command of the pitch is fringy. Ullola threw an upper-80s changeup but it was thrown infrequently.
The Future: Ullola has big stuff and has shown slight command gains but will probably never have the command to start. His future likely lies as a middle reliever where he can air it out.
Scouting Grades Fastball: 60 | Curveball: 45 | Slider: 50 | Changeup: 40 | Control: 40 -
BA Grade/Risk: 50/High
Track Record: Signed out of the Dominican Republic during the 2021 international signing period, Ullola first popped during that year's Dominican Summer League season. He struck out 34 batters in 21 innings before coming to the U.S. and making two appearances in the Florida Complex League. In 2022, Ullola was assigned to Low-A Fayetteville in late April and made his full-season debut on May 1. He made 22 appearances, 11 of them starts, and recorded a 3.25 ERA, while allowing a .155 average and striking out 38% of batters. At 19 years old on Opening Day, Ullola was one of the youngest pitchers in a full-season league.
Scouting Report: A fire-breathing dragon in the making, Ullola's current form is heavily centered around his easy plus fastball. He sits 93-95 mph touches 98 at peak. Ullola's fastball creates both heavy riding life and a flat plane of approach to the plate. The combination of velocity, movement and release traits translated to eye-popping whiff numbers against the pitch. Among pitchers who threw 700 or more fastballs in 2022, Ullola's 48% whiff rate was the highest in the minor leagues by nearly eight full percentage points. While Ullola's fastball is plus, his trio of secondaries is still fairly raw. He mixes a mid-80s slider, low-80s curveball and high-80s changeup but struggles to command all of his secondary offerings for long stretches. His command overall is below-average, but it's reasonable to expect improved strike-throwing as Ullola moves up the minor league ladder.
The Future: A tantalizing talent who has drawn comparisons with Cristian Javier from some within the Astros' organization, Ullola has the look of a high-leverage power reliever in the long term, but he will be given every opportunity to start.
Scouting Grades: Fastball: 60. Slider: 50. Curveball: 50. Changeup: 40. Control: 45
Scouting Reports
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BA Grade/Risk: 50/High
Track Record: Signed out of the Dominican Republic during the 2021 international signing period, Ullola first popped during that year's Dominican Summer League season. He struck out 34 batters in 21 innings before coming to the U.S. and making two appearances in the Florida Complex League. In 2022, Ullola was assigned to Low-A Fayetteville in late April and made his full-season debut on May 1. He made 22 appearances, 11 of them starts, and recorded a 3.25 ERA, while allowing a .155 average and striking out 38% of batters. At 19 years old on Opening Day, Ullola was one of the youngest pitchers in a full-season league.
Scouting Report: A fire-breathing dragon in the making, Ullola's current form is heavily centered around his easy plus fastball. He sits 93-95 mph touches 98 at peak. Ullola's fastball creates both heavy riding life and a flat plane of approach to the plate. The combination of velocity, movement and release traits translated to eye-popping whiff numbers against the pitch. Among pitchers who threw 700 or more fastballs in 2022, Ullola's 48% whiff rate was the highest in the minor leagues by nearly eight full percentage points. While Ullola's fastball is plus, his trio of secondaries is still fairly raw. He mixes a mid-80s slider, low-80s curveball and high-80s changeup but struggles to command all of his secondary offerings for long stretches. His command overall is below-average, but it's reasonable to expect improved strike-throwing as Ullola moves up the minor league ladder.
The Future: A tantalizing talent who has drawn comparisons with Cristian Javier from some within the Astros' organization, Ullola has the look of a high-leverage power reliever in the long term, but he will be given every opportunity to start.
Scouting Grades: Fastball: 60. Slider: 50. Curveball: 50. Changeup: 40. Control: 45 -
BA Grade/Risk: 50/High
Track Record: Signed out of the Dominican Republic during the 2021 international signing period, Ullola first popped during that year's Dominican Summer League season. He struck out 34 batters in 21 innings before coming to the U.S. and making two appearances in the Florida Complex League. In 2022, Ullola was assigned to Low-A Fayetteville in late April and made his full-season debut on May 1. He made 22 appearances, 11 of them starts, and recorded a 3.25 ERA, while allowing a .155 average and striking out 38% of batters. At 19 years old on Opening Day, Ullola was one of the youngest pitchers in a full-season league.
Scouting Report: A fire-breathing dragon in the making, Ullola's current form is heavily centered around his easy plus fastball. He sits 93-95 mph touches 98 at peak. Ullola's fastball creates both heavy riding life and a flat plane of approach to the plate. The combination of velocity, movement and release traits translated to eye-popping whiff numbers against the pitch. Among pitchers who threw 700 or more fastballs in 2022, Ullola's 48% whiff rate was the highest in the minor leagues by nearly eight full percentage points. While Ullola's fastball is plus, his trio of secondaries is still fairly raw. He mixes a mid-80s slider, low-80s curveball and high-80s changeup but struggles to command all of his secondary offerings for long stretches. His command overall is below-average, but it's reasonable to expect improved strike-throwing as Ullola moves up the minor league ladder.
The Future: A tantalizing talent who has drawn comparisons with Cristian Javier from some within the Astros' organization, Ullola has the look of a high-leverage power reliever in the long term, but he will be given every opportunity to start.
Scouting Grades: Fastball: 60. Slider: 50. Curveball: 50. Changeup: 40. Control: 45
Career Transactions
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Houston Astros invited non-roster RHP Miguel Ullola to spring training.
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RHP Miguel Ullola assigned to Sugar Land Space Cowboys from Corpus Christi Hooks.
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RHP Miguel Ullola assigned to Corpus Christi Hooks from Asheville Tourists.
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RHP Miguel Ullola assigned to Asheville Tourists from Fayetteville Woodpeckers.
