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What changed, and why.

Each case shows where the person started, what ATP found, what came first, and what changed. We show the reasoning, including the moments the plan had to change.

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Pitcher · Stanford University
Verified case
Bryce Hill
From 74 mph and 140 lb to 101.7 mph and 220 lb. Now at Stanford University.
An eighth grader at about 140 lb who added 80 to 90 lb, first touched 90 as a sophomore, hit 99 the summer before senior year, and reached triple digits in 2026. He trains with ATP.
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Pitcher · Indianapolis Clowns, Banana Ball Championship League
Featured case
Clark Gilmore
155 to 220 lb and 80 to 93 mph. Joel Barlow High School to Dartmouth, Notre Dame, and the Indianapolis Clowns.
A Redding, Connecticut pitcher who walked into ATP in September 2018 as a 155 lb junior at Joel Barlow High School throwing 80 mph. Six months later he was 190 lb and 87, and committed to Dartmouth. He came back every college offseason and reached 220 lb and 93 mph. Dartmouth 2022 to 2024, a graduate season at Notre Dame in 2025, and the last pick of the first Banana Ball draft in November 2025. Now the Indianapolis Clowns pitcher with the behind-the-back changeup.
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Pitcher · Miami Marlins organization
Featured case
Jake Walkinshaw
Back from UCL reconstruction in 11.5 months in college. Rebuilt again as a professional, more than once. Seven professional seasons, a 99 mph fastball, and an average still climbing at 29.
A Seymour, Connecticut pitcher who came to ATP in college, fresh out of UCL reconstruction in 2017, and was back closing games for Southern New Hampshire University 11.5 months later. Drafted by the Oakland Athletics in 2019, he has pitched seven professional seasons since, reached Triple-A in 2022, clinched the 2025 Pacific Coast League title with a 99 mph sinker, and signed with the Miami Marlins organization in 2026, where his fastball averaged 96 mph at Triple-A Jacksonville. The arm has needed more surgery along the way, including a second elbow reconstruction and time on the injured list, and he has come back each time, with ATP for every rehab and every offseason.
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High school shortstop to professional
Verified case
Sammy Stafura
Exit velocity 75 to 100 mph. 140 to 194 lb. Walter Panas High School to the 43rd pick in the 2023 draft.
A Cortlandt Manor, New York shortstop who started on ATP's free 90 mph Formula content in October 2019 at 5-7 and 140 lb, trained on-site in Stamford from August 2020 through the 2023 draft (an hour each way), and reached that draft at 6-0 and 194 lb with a 100 mph exit velocity and a 6.42 sixty. Gatorade New York Player of the Year, 43rd overall to the Cincinnati Reds; now in the New York Mets organization.
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Professional athlete · World Long Drive · therapy and training
Verified case
Monica Lieving
Six years of daily back pain, gone. Club head speed 125.2 to 128.9 mph in four months and seven treatments. The limiter was neurological.
The 2023 World Long Drive champion had been told she had a herniated disc. ATP's evaluation found a reactive nervous system that did not know where her body was in space. Acupuncture, functional neurology, training and a supplement protocol, seven treatments over four months: daily back pain gone, migraines gone, vertigo on the tee almost never, sleep restored, and a club head speed record of 128.9 mph.
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Defensive lineman · Denver Broncos
Therapy case
Zach Allen
Bodywork and nervous-system work to keep an NFL body tuned for the season.
A New Canaan, Connecticut native who played at Boston College, was drafted by the Arizona Cardinals in 2019 and has been a Denver Bronco since 2023: first-team All-Pro and Pro Bowl in 2025, and a four-year, $102 million extension signed that August. ATP's part is integrated performance therapy, since 2024: bodywork for the tissue that takes the collisions and nervous-system work to fine-tune his body for the season. His training, his development and his football are his own and the Broncos'.
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College pitcher to professional
Verified case
Adam Stone
93 to 97 mph. 185 to 215 lb. Harvard to a professional contract.
A 6-6 Harvard right-hander who started with ATP in December 2019, added 30 lb and 4 mph on remote programming, pitched for the USA Collegiate National Team, and signed with the New York Yankees in 2022. He is now in the Chicago Cubs organization and still trains with ATP every offseason.
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Pitcher · Colgate University softball
Verified case
Willow Edwards
Rye Country Day to Colgate. Four years on a floor built around baseball arms.
A Rye Country Day softball pitcher who trained at ATP through high school in a room full of pitchers. All-League first team three times, All-NEPSAC honorable mention in 2023 and a full All-NEPSAC selection in 2024, team MVP twice, a two-year captain, and a Division I debut for Colgate in February 2026.
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Right-handed pitcher · Fairfield Prep, Northwestern commit
Verified case
Andrew Wong
Fastball 84 to 95 mph in 22 months. Number two in Connecticut for the class of 2026. Fairfield Prep to Northwestern.
A Stamford right-hander who came to ATP as a freshman. He told Prep Baseball Report he was 6-2 and 150 lb that year. Perfect Game now lists him at 6-7, 220, clocked him at 95 in June 2025, graded him 9.5, and ranks him second in Connecticut and 352nd nationally for the class of 2026. Committed to Northwestern in November 2024.
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Left-handed pitcher · University of New Haven
Verified case
Chris Yannella
Fastball 79 to 94 mph since he came to ATP. First 80, first 90, then 94 as a college freshman. Foran High School to the University of New Haven.
A Milford, Connecticut left-hander who was at 71 as a sophomore, topped 79 in his junior spring after a UCL strain, and arrived at ATP in March 2024 injured and low on confidence, in his words. At ATP he threw his first 80 and his first 90: 91 the summer after senior year, then 94, sitting 89 to 92, the summer after his freshman year at the University of New Haven. The public record agrees on the direction: 68 to 70 mph at a Prep Baseball Report scout day before ATP, 82 at Perfect Game four and a half months in, the 75th percentile for his class. Now at the University of New Haven.
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Right-handed pitcher · St. John's, then Manhattan University
Verified case
Andrew Castelluccio
Fastball 73 to 87 mph in two years. Ridgefield High School to St. John's, then Manhattan University.
A Ridgefield, Connecticut right-hander clocked at 73 mph by Prep Baseball Report in February 2019, four months before his first ATP session. Perfect Game had him at 87 by February 2021, with the exit velocity and infield arm up as much. Four college seasons.
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Outfielder and first baseman · Wilton High School, Haverford College commit
Verified case
Casey Meyer
Exit velocity 85 to 96 mph in 17 months. Wilton High School to a Haverford College commitment.
A 6-5 Wilton outfielder who started training regularly at ATP in October 2023, the month Prep Baseball Report measured his exit velocity at 85 mph. Seventeen months later the same scout-day series had him at 96, with the fastball up from the mid-70s to 81 and a 6.9 sixty. All-FCIAC honorable mention in 2026, and committed to Haverford College.
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Outfielder · Fairfield Prep, class of 2027
Verified case
Brady Cesaratto
Exit velocity 65 to 100 mph. 132 to 190 lb. Preseason All-State as a junior.
A Fairfield Prep outfielder who came to ATP as a sophomore. Perfect Game had him at a 65 mph exit velocity and a 68 mph arm in March 2022. By April 2026 Prep Baseball Report listed 100 and 91, and he hit .517 for the SCC champions.
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Right-handed pitcher · Tufts University commit
Verified case
Tyler Easterbrook
Fastball 76 to 89.9 mph in two and a half years. Darien High School and Deerfield Academy to Tufts.
A Darien pitcher who started at ATP in June 2022. Perfect Game's first reading three months later was 76 mph. Prep Baseball Report clocked 89.9 in March 2025, and he committed to Tufts that July.
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Pitcher and outfielder · Darien High School, Army commit
Verified case
Devin Montesano
A 98.4 mph exit velocity, an 88 mph fastball, and a commitment to Army.
A Darien two-way player who came to ATP as a freshman. Prep Baseball Report lists a 98.4 mph exit velocity, an 88 mph fastball, an 86 mph outfield arm and a 7.41 sixty. He committed to Army in July 2026.
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Third baseman and catcher · Fairfield Prep, Army commit
Verified case
Jack Nolan
A 95.2 mph exit velocity, an 86 mph infield arm, and a commitment to Army.
A Darien third baseman and catcher who came to ATP the first week of his freshman year at Fairfield Prep. Prep Baseball Report lists a 95.2 mph exit velocity, an 86 mph infield arm, an 86 mph fastball and a 7.40 sixty. He committed to Army in November 2025.
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The numbers, at a glance.

Four ATP pitchers and hitters, each with a full case above. Every number is a Perfect Game or Prep Baseball Report reading on the dates shown, nothing estimated or rounded.

Andrew Wong
Right-handed pitcher. Fairfield Prep to Northwestern University.
84to95mph
Fastball, August 2023 to June 2025. Read the case
Andrew Castelluccio
Right-handed pitcher. St. John's University and Manhattan University.
73to87mph
Fastball, February 2019 to February 2021. The 73 was recorded four months before his first ATP session. Read the case
Casey Meyer
Outfielder and first baseman, Wilton High School. Haverford College commit.
85to96mph
Exit velocity, October 2023 to March 2025, 17 months. Read the case
Chris Yannella
Left-handed pitcher, University of New Haven.
70to82mph
Fastball, January 2023 to August 2024. The 82 came four and a half months after his first ATP session. Read the case

The professionals, year over year.

Five professionals who have trained at ATP across seasons, against the public record: season lines from the MLB Stats API and pitch or ball tracking at the levels that have it. Nothing here is an ATP reading, and nothing is estimated or rounded.

For an established professional the radar gun rarely moves much. What moved for these five was availability, role, strikeouts and runs allowed.

Jake Walkinshaw
Pitcher, Miami Marlins organization. At ATP since his college UCL rehab.
92.6to96.0mph
Average fastball at Triple-A, 2022 to 2026. Strikeout rate 13.7 to 24.4 percent from 2025 to 2026. Hardest tracked pitch 99.1 mph, September 19, 2025. Read the case
Alex Santos
Right-handed pitcher, Houston Astros organization.
7.83to3.38ERA
Double-A earned run average, 2024 to 2026. Strikeouts per nine 9.4 to 13.8 over the same window, as a starter and then out of the bullpen. Fastball about the same both years. Triple-A debut in September 2026: ten games, 0.77 ERA, 18 strikeouts in 11.2 innings.
Zack Short
Infielder, New York Mets organization.
6seasons
Straight seasons with big-league time, 2021 through 2026. More than 100 games played in four of those seasons, majors and Triple-A combined, and his most big-league games, 112, in 2023.
Adam Stone
Pitcher, Chicago Cubs organization.
7.20to2.20ERA
Earned run average, Single-A to High-A, 2023 to 2026. 27 games and 44 strikeouts in 49 innings for South Bend in 2026. Four-seam fastball tracked at 97.0 mph in the Arizona Fall League, October 16, 2025. Read the case
Josiah Gray
Pitcher, Washington Nationals. Trained at ATP through college and his early pro years.
58starts
Starts in the Nationals rotation, 2022 and 2023. 148.2 innings in 2022 and 159 in 2023, and the 2023 All-Star Game. Le Moyne College to the 2018 draft to the majors in 2021.

The same reasoning, other problems.

These two are illustrative composites drawn from the kinds of cases ATP sees, not one person. They show how the evaluation thinks. Names, quotes and numbers appear only once ATP has verified them and holds permission.

Some of the athletes we work with.

Josiah Gray
Pitcher, Washington Nationals. Trained at ATP through college and his early pro years: Le Moyne to the 2018 draft, the majors in 2021, the 2023 All-Star Game.
Jason Foley
Pitcher, San Francisco Giants.
Zach Allen
Defensive lineman, Denver Broncos. All-Pro and Pro Bowl.
Austin Pope
Pitcher. Major League debut with the Arizona Diamondbacks.
Joe Jacques
Pitcher, formerly Boston Red Sox and Arizona Diamondbacks.
Zack Short
Infielder, New York Mets organization. Big-league time in six straight seasons, 2021 through 2026.
Monica Lieving
World Long Drive champion.
Alex Santos
Right-handed pitcher, Houston Astros organization. Reached Triple-A in 2026.
Sammy Stafura
Shortstop, New York Mets organization.
Adam Stone
Pitcher, Chicago Cubs organization. Harvard.
Jake Walkinshaw
Pitcher, Miami Marlins organization. ATP since his college UCL rehab.
Clark Gilmore
Pitcher, Indianapolis Clowns, Banana Ball Championship League. Dartmouth and Notre Dame.
Bryce Hill
Pitcher, Stanford University.
Andrew Rogovic
Right-handed pitcher, Ole Miss.
Warner Gearhart
Left-handed pitcher, Oberlin College.
Andrew Castelluccio
Right-handed pitcher, Manhattan University. St. John's before that.
Chris Yannella
Left-handed pitcher, University of New Haven.
Andrew Wong
Right-handed pitcher, Fairfield Prep. Northwestern University commit.
Willow Edwards
Pitcher, Colgate University softball.
Tyler Easterbrook
Right-handed pitcher, Deerfield Academy. Tufts University commit.
Nick DiMaso
High school infielder and outfielder, college commit.
Brady Cesaratto
Outfielder, Fairfield Prep.
Devin Montesano
Pitcher and outfielder, Darien High School. Army commit.
Jack Nolan
Third baseman and catcher, Fairfield Prep. Army commit.
Casey Meyer
Outfielder and first baseman, Wilton High School. Haverford College commit.