Performance Short With Built In Brief
A premium athletic short with a supportive brief built inside. The double-layered pouch gives you groin support, and the outer short ends just above the knee, so you can train, practice and compete in one piece. It has no cup pocket and isn’t made to be worn with a cup.
No cup pocket: support for when you don’t need a cup
Built-in brief with a double-layered pouch
Wear it as your outer short. Ends just above the knee.
Not for use with an athletic cup. The Performance Short With Built-In Brief has no cup pocket. It’s made for groin support when your sport or workout doesn’t require a cup. Need a cup? Shop our Jock Systems.
Free U.S. shipping on orders over $175. Ground, 2-Day and Overnight options at checkout.
30-day returns and free exchanges. Add Checkout+ at checkout for free returns and package protection.
Lifetime warranty on the athletic cup.
Performance short Brief size guide
Measure around your natural waist, just above the hips. Don’t go by pant size.
| Size | Waist | Weight (approx.) |
|---|---|---|
| Small | 28–30" | 140–170 lb |
| Medium | 31–33" | 170–200 lb |
| Large | 34–36" | 200–230 lb |
| X Large | 37–40" | 230–270 lb |
Built for a snug, supportive fit. Between sizes? Athletes with bigger thighs or glutes usually size up. Leaner builds may prefer the closer fit. The waistband has a drawstring. Full size chart
What’s included
One Performance Short With Built-In Brief. 2pk and 3pk give you two or three in the same size. No cup pocket. Not designed to be worn with an athletic cup.
Shipping & returns
Orders are processed and shipped within 1–3 business days. We don’t ship on weekends or major U.S. holidays, so a Friday order usually ships the following Tuesday. Delivery time starts once your order ships. See our full shipping policy →
- Shipping is calculated at checkout, with Ground, 2-Day and Overnight options.
- Free shipping on U.S. orders over $175.
- Returns are accepted within 30 days of delivery, even on worn or used gear.
- Exchanges are free on every order.
- Add Checkout+ at checkout for free returns and package protection.
- Refunds go to your original payment method or store credit, your choice. Allow 5–7 business days once we receive the return.
- Shipping fees aren’t refundable once an order ships.
Size chart & fit guide
Diamond MMA Size Chart
Size every Diamond MMA jock, short and brief by your waist, measured just above the hips. Not your pant size. Athletic cups come in Youth and Adult, and most athletes move to the adult cup around ages 14 to 15.
Start here
How do I measure for a jock or compression short?
It takes about a minute with a soft tape measure.
Find your natural waist
It's just above your hip bones, usually a little above your belly button.
Measure around
Wrap the tape around your body, level and snug, but not tight. Don't go by your pant size.
Match the chart
Find your waist in the chart for your product. Weight ranges are there to help if you're on the line.
Athletic cups
What size athletic cup do I need?
Our athletic cup comes in two sizes. Both use the same polycarbonate shell and soft rubber elastomer rim. Pick the one that covers fully without pinching at the edges.
| Cup | Length | Width | Depth |
|---|---|---|---|
| Youth | 5.5" | 3" | 2" |
| Adult | 6.75" | 4" | 2.25" |
When to move up: most athletes move from the youth cup to the adult cup around ages 14 to 15, depending on body type. If the youth cup no longer covers everything, it's time.
Adult
Quad Strap Jock & Compression Jock Short size chart
Built for a snug, supportive fit. Adult sizes have a drawstring waistband.
| Size | Waist | Weight (approx.) |
|---|---|---|
| Small | 28–30" | 120–150 lb |
| Medium | 30–32" | 140–170 lb |
| Large | 32–34" | 160–190 lb |
| X Large | 34–36" | 180–220 lb |
| 2XL | 36–40" | 210–260 lb |
| 3XL | 41–44" | 250–300 lb |
Fits: Quad Strap Jock System · Quad Strap Jock · Compression Jock Short System · Compression Jock Shorts
Youth
Youth jock & compression short size chart
Youth sizes don't have a drawstring, so measure carefully. Outgrown Youth X Large? Move to adult Small.
| Size | Age (approx.) | Waist |
|---|---|---|
| Youth Medium | 8–10 | 22–24" |
| Youth Large | 10–12 | 24–26" |
| Youth X Large | 12–14 | 26–29" |
Fits: Youth Quad Strap Jock System · Youth Compression Jock & Athletic Cup System · Youth Compression Jock Short System | White
Hockey
Hockey jock short, garter & jock pant size chart
Our hockey line runs Small to 2XL. Between sizes, or thicker in the thighs or seat? Go up a size.
| Size | Waist | Weight (approx.) |
|---|---|---|
| Small | 28–30" | 120–150 lb |
| Medium | 30–32" | 140–170 lb |
| Large | 32–34" | 160–190 lb |
| X Large | 34–36" | 180–220 lb |
| 2XL | 36–40" | 210–260 lb |
Fits: 3 in 1 Hockey Garter Belt · Hockey Jock Short System · Hockey Jock Short · Cut-Resistant Hockey Jock Short System · Cut-Resistant Hockey Jock Pant System
Performance Short
Performance Short size chart
The Performance Short runs on its own chart, Small to X Large, for both the built-in jock and built-in brief versions. The waistband has a drawstring.
| Size | Waist | Weight (approx.) |
|---|---|---|
| Small | 28–30" | 140–170 lb |
| Medium | 31–33" | 170–200 lb |
| Large | 34–36" | 200–230 lb |
| X Large | 37–40" | 230–270 lb |
Fits: Performance Short With Built-In Jock System · Performance Short With Built-In Jock · Performance Short With Built In Brief
Briefs
Compression Brief & Sports Boxer Brief size chart
Both briefs share one chart. They're made for support on days you don't need a cup. Size down for more compression, or size up for a more relaxed everyday fit.
| Size | Waist | Weight (approx.) |
|---|---|---|
| Small | 28–30" | 130–155 lb |
| Medium | 31–33" | 155–185 lb |
| Large | 34–36" | 185–215 lb |
| X Large | 37–40" | 215–250 lb |
| 2XL | 41–44" | 250–290 lb |
Fits: Compression Brief · Sports Boxer Brief
Fit tips
Between sizes?
Bigger thighs or glutes
Size up. The quad straps and leg openings will sit more comfortably.
Leaner build
Take the smaller size for a closer fit that holds the cup tighter.
Wrong size?
Exchanges are free on every order. Start one in the returns portal.
Apparel
Rash guard & T-shirt size charts
Questions
Sizing questions
How should an athletic cup fit?
It should cover everything, sit flat against your body and stay put when you run or squat. If it gaps at the edges or pinches, try the other size.
Should I go by my pant size?
No. Measure around your natural waist, just above the hips. Pant sizes vary by brand and usually sit lower on the body.
When should a youth athlete move to the adult cup?
Most athletes move from the youth cup to the adult cup around ages 14 to 15, depending on body type. If the youth cup no longer covers everything, it's time to size up.
Can I get a youth cup with an adult jock?
Yes. Our adult Systems let you choose the adult or youth cup, which works well for teens and smaller-framed athletes.
What if I'm between sizes?
Athletes with bigger thighs or glutes usually size up. Leaner builds may like the smaller size for a closer fit. Exchanges are free if you need to swap.
What if it doesn't fit?
Exchanges are free on every order. You can also return it within 30 days of delivery. Start through our returns portal.
Still not sure?
Answer a few questions and we'll match you to the right jock, cup and size for your sport. Or email info@diamondmma.com and our team will help.
Product details
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Description
Groin support without a cup. The Performance Short With Built-In Brief has no cup pocket and isn’t designed to be worn with an athletic cup.
Inside is a supportive brief with a double-layered pouch and gusset. Outside is a clean, stretch athletic short with a drawstring waistband that ends just above the knee. One piece, nothing to layer underneath.
It’s the same outer short as our Performance Short With Built-In Jock, made for training days, practice and game days that don’t call for a cup.
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Materials & care
Fabric: 82% nylon, 18% elastane jersey
Inner brief: Double-layered pouch and gusset
Waistband: 2" jacquard knit logo elastic with drawstring
Leg openings: 1.5" non-roll elastic
Length: Ends just above the knee
Care: Machine wash cold -
Warranty
The Performance Short With Built-In Brief has a 30-day warranty, like every Diamond MMA product other than the athletic cup.
Problem with your gear? Fill out the Warranty Claim Form.
What is a performance short with a built-in brief?
It’s an outer athletic short with a supportive brief sewn inside, so you get groin support without wearing a separate brief or compression short underneath. The inner brief has a double-layered pouch, and the outer short ends just above the knee. It’s made for training and sports where you want support but don’t need a cup. If your sport needs a cup, the Performance Short With Built-In Jock uses the same short with a four-strap jock inside.
One short. Support built in.
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Brief built inside
A double-layered pouch and gusset give you groin support without a separate layer underneath.
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Made to wear out
A stretch athletic short with a drawstring waistband that ends just above the knee. Train, practice or compete in it.
Frequently asked questions
Can I wear an athletic cup with it?
No. The Performance Short With Built-In Brief has no cup pocket and isn’t designed to be worn with a cup. It’s for training and sports that don’t require a cup. If you need a cup, check out our Jock Collection.
What size performance short should I get?
Measure around your natural waist, just above the hips, and match it to the size guide: Small 28–30", Medium 31–33", Large 34–36", X Large 37–40". Between sizes? Athletes with bigger thighs or glutes usually size up. Leaner builds may prefer the closer fit.
Can I wear it as my regular training short?
Yes. It’s made to be worn as an outer short. The brief is built inside, and the short ends just above the knee, so you can train, practice or compete in it with nothing underneath.
What’s the difference between this and the Performance Short With Built-In Jock?
They use the same outer short. This one has a supportive brief built inside, for workouts that don’t need a cup. The Performance Short With Built-In Jock has a four-strap jock and cup pocket inside, for sports that do.
Which brief should I get?
None of our briefs have a cup pocket, and none are made to be worn with a cup. They’re supportive briefs for when you need groin support but not a cup. The difference is what’s built around the brief.
Sports Boxer Brief: Your everyday boxer brief, with a double-layered flyless pouch and a 5" inseam. Wear it on its own, or as a base layer under the Quad Strap Jock or 3 in 1 Hockey Garter Belt.
Compression Boxer Brief: A compression short with a brief built inside. The inner brief gives you support, and the outer compression short keeps everything from bunching under your gear.
Performance Short With Built-In Brief: Our Performance Short with the same built-in brief inside. Wear it as your outer short. It ends just above the knee.
What do the 2pk and 3pk include?
Two or three Performance Shorts With Built-In Brief in the size you choose.
How much is shipping?
Shipping is calculated at checkout, with Ground, 2-Day and Overnight options. U.S. orders over $175 ship free.
What if it doesn’t fit?
Exchanges are free, so you can swap for the right size. You can also return it within 30 days of delivery, even if you’ve worn it. Add Checkout+ at checkout for free returns and package protection.
What does the warranty cover?
The Performance Short With Built-In Brief has a 30-day warranty. Fill out the Warranty Claim Form if you have a problem.
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