Summer
Summer Development
8 weeksThe biggest training window of the year, right before fall ball.
Serious softball players train here.
The DC Complete Player Program (CPP) is a development system for serious softball players. Hitting, strength, live at-bats, fielding, recruiting guidance, and more under one roof and run by one staff.
Athletes from the Team Yudin program have gone on to play at:
Champions do more.
We built Diamond Club to give Valley softball players the kind of structured, measured development that used to only exist inside a college program.
Purpose
Every session has a plan tied to her goals. No filler reps, no generic lessons.
Accountability
She gets baselined on day one. You see the data. So does she.
Environment
She trains next to players who want it as badly as she does.
Standard
Our program heads have Division I coaching experience. We know the standard D1 athletes are held to, and we hold our players to it.
What's inside the CPP
Seven pieces, one staff, one plan for her. They only work when they run together, which is why we do it all under one roof.
Hitting
Small-group hitting
Structured progressions and video feedback in small groups. Coached by former Division I hitters.
Strength
Softball-specific S&C
A written program from the Team Yudin staff, built for rotational athletes. Technique first, then load.
Live reps
Live at-bats
Live arms every week, so what she builds in the cage shows up in games.
Tracking
Metric database and video analysis
Baseline on day one, progress measured, swing video reviewed. Progress you can see, not a guess.
Defense
Fielding
Footwork, glove work and game-speed reps, on the same plan as her bat.
Mindset
Mental game
A framework for handling pressure, so her best swings show up when the game is on the line.
Next level
College recruiting guidance
Coaches who played college softball help her and your family through recruiting.
High-level development programs, year-round.
College athletes train with the whole year in mind. So should you.
Fall
Fall Development
8 weeksBuilt around her fall ball schedule.
Winter
Winter Intensive
4 weeksFocused offseason work when nothing else competes for her time.
Spring
Spring In-Season Program
3 monthsKeeps her sharp while she competes. Same coaches, same tracking.
Every program comes with a 100% money-back guarantee: if the work doesn't move her metrics, you get your money back.
Start with a season, stay in the system. Every seasonal program leads into the CPP. Joining between seasons? She can start right away.
This is not a lesson program, and it is not for everyone.
We work with a small number of players who are ready to be coached hard and measured honestly. Here is what that looks like.
Measured, not guessed
HitTrax on every swing that matters. Her metrics are tracked from day one and reviewed with you.
Strength that transfers
A softball-specific strength program built by the Team Yudin staff. Technique before load, always.
Live at-bats every week
She sees live arms in a competitive setting every week, so cage work becomes game results.
Small groups
Enrollment is capped each season. Small groups mean her coach actually watches her swing.
A guarantee with teeth
Every seasonal program comes with a 100% money-back guarantee tied to her tracked metrics. We can offer it because we measure everything.
The same training she'll do at the next level. Starting now.
Every Diamond Club athlete trains on Team Yudin Training, a strength and conditioning program that has sent 150+ athletes to college programs. She learns the explosive movement patterns college programs build their athletes on, made specific to softball, so she shows up ready instead of catching up.
Explosive movement patterns
She trains to sprint, rotate, swing and throw with more force. The patterns that make an athlete faster and more powerful on the field.
Next-level training, now
The same kind of work she'll see in a college weight room. When she gets there, it's familiar.
Softball strong
Built for softball, not borrowed from a general gym. It shows up everywhere: harder contact, quicker first steps, stronger throws.
Built to stay on the field
Technique before load, always. A stronger, more durable athlete stays healthy through a long season.
- 150+
- athletes placed in college programs
- NSPA
- Coach of the Year on staff
Where Team Yudin softball players went next
42 athletes. 40 schools. 22 states.Tap a dot to see who went where. ◆ is Diamond Club.
See all 42 athletes
- UCLAMaddy Jelenicki
- University of AlabamaAlly Shipman
- University of ArizonaJess Harper
- StanfordAly Kaneshiro
- UtahJordyn Gasper
- University of TexasShea O'Leary
- Texas A&MAllie Enright
- Boise StateKate Penberthy
- Notre DameTenley Sweet
- IonaMaddie Campeau
- HawaiiAshley Murphy
- OklahomaMariah Lopez
- PrincetonAdrienne Chang
- UCSDBrittany Ross Smith
- San Diego StateJessica Cordola
- UCSBAlyssa Molina
- Cal BerkeleySophie Medellin
- Mercy CollegeNicole Smart
- Idaho StateEmma Montoya
- Merrimack CollegeViviana Bocanegra
- DePaulErin Andres
- College of CharlestonNoel Dominguez
- North TexasAmarys Miller - Godsey
- Utah Valley UniversityKyla Hardy
- Coppin State UniversityAlexis Genovese
- Academy of ArtNikki West
- HawaiiKennedy Thompson
- Cal Baptist UniversityAlley Johnson
- Miami of OhioCarly Mortenson
- Bushnell UniversityLeslie Reynaga
- Chatham UniversitySofia Trujillo
- Minnesota State University MankatoBrie Stone
- University of TampaAllie Specht
- George Fox UniversitySarah Jacobs
- LMUScarlett Carlson
- UCSDAubrey Akins
- Fresno StateAlyssa Ramirez
- TennesseeGracie Keene
- University of PacificDelaney Scully
- New MexicoEmma Bramson
- Cal State FullertonCheyanne Marxer
- CSUNSavanna Smith
Our team
One team, one plan for her. Everyone here works together on her development, from the cage to the weight room to the front desk.
Jessie Harper
Head of Softball
University of Arizona. 3x All-American. 92 career home runs. Former Director of Player Development at Clemson.
Audrie Reuss
Head of S&C
CSCS, CPT. Sports performance coach at CSUN.
Hank Kaufman
S&C Coach
CSUN Volleyball. Assistant trainer with Team Yudin.
Sabrina Olmo
Softball Coach
Outfielder, William Jewell College.
Kevin Chandler
Co-founder, CEO
UC Santa Barbara. Played in the College World Series. Runs the program and talks with every family before they start.
Jared Yamasaki
Co-founder, COO
Runs operations, scheduling and the athlete tracking system.
Sofia Mitas
Operations
Sofia grew up locally and played softball at Notre Dame HS. She helps with CPP operations and content for our team.
What people are saying
“The coaches are knowledgeable, encouraging, and genuinely invested in helping players improve… We’ve seen so much growth in both hitting and confidence since training at Diamond Club.”
“My daughter has been coming here, and the experience has been amazing from day one… Since training here, I’ve seen a massive transformation not just in her physical softball skills, but in her overall confidence and mental approach to the game.”
“I’m a PA in orthopedic surgery, and I see a lot of young athletes before and after procedures. The ones who train at Diamond Club stand out… When an athlete comes back from a procedure, their staff asks for the restrictions, follows them and keeps the family in the loop.”
“The atmosphere at The Diamond Club is welcoming and supportive. They are genuinely interested in creating a camaraderie among the girls and promoting a positive environment that motivates you to push your limits and achieve your goals.”
“A true gem for the girlies!… We love that Diamond has a team of highly experienced coaches dedicated to shaping the next generation of softball players.”
“This is such an amazing place for softball girls… The owners are incredible, open to new ideas and always striving to improve their facility…”
How it works
Three steps from this page to her first session.
See if she's a fit
Answer a few quick questions about where she is, where she wants to go and her schedule. If it is not a fit, we will tell you honestly.
Pick her starting point
Start with a seasonal program, or step straight into the CPP between seasons.
Day one baseline, then go
Her first session is a full baseline on HitTrax and in the weight room. Every session after that builds on it, and you can see her metrics move.
The guarantee
Every program comes with a 100% money-back guarantee. We can offer it because we baseline her on day one and measure her progress, so there is no guessing about whether the work is working.
- Baselined on day one
- You see her metrics throughout, not just at the end
- If the work doesn't move her metrics, you get your money back
Tracked from day one. Guaranteed.
100% money back
Questions parents ask
Who is this for?
We only take on players who:
- Are serious about softball and 13 or older
- Play travel ball or high school and want to play at the next level
- Want this for themselves, not just because a parent signed them up
- Will show up consistently and commit to a full program
- Have a family behind them that's bought in too
If that sounds like her, she'll fit right in. If she's not there yet, we'll tell you honestly.
Does she need to already be an elite player?
No. She needs to be committed. Talent varies a lot in our gym. Effort doesn't. We'll tell you on the call if we think it's a fit.
What happens on the call?
Fifteen minutes on the phone with Kevin. We ask about her current level, her goals and her schedule. You ask whatever you want. Afterward you get a written recap and a one-page overview so you can decide without pressure.
How much does it cost?
We cover that on the call. It is priced in line with what serious families already spend on private lessons and travel ball, and it comes with a guarantee those do not.
What if she is in season?
The Spring In-Season Program is built for exactly that. Lighter load, same coaches, same tracking, scheduled around her games.
Can I watch her train?
Yes. Parents are welcome at the facility.
Where are you located?
21018 Osborne St #2, Chatsworth, CA 91304. Near DeSoto and Nordhoff.
See if your athlete is a fit
Answer a few quick questions about her and pick a time. It is the only way in.