NuttyBuddy Flex Athletic Cup

NB-FLEX NuttyBuddy Flex Athletic Cup Front Left Angled View

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  • NB-FLEX NuttyBuddy Flex Athletic Cup Front Left Angled View
  • NB-FLEX NuttyBuddy Flex Athletic Cup Front Left Angled View with Diagram
  • NB-FLEX NuttyBuddy Flex Athletic Cup Front View
  • NB-FLEX NuttyBuddy Flex Athletic Cup Left Side View
  • NB-FLEX NuttyBuddy Flex Athletic Cup Back Right Angled View
  • NB-FLEX NuttyBuddy Flex Athletic Cup Inside View
  • NuttyBuddy Size Chart
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A baseball traveling at 90 mph can deliver 2,400 lbs of force. Other cups on the market can reduce that impact to 450 lbs of force—still enough to cause serious injury. The NuttyBuddy® Flex Cup has been proven in scientific tests to reduce that impact to just 110 lbs of force, which is within acceptable levels of impact.

A properly fitting cup shifts less, is more comfortable, and does not impede movement or performance. The unique, award-winning design of the Nutty Buddy Flex Cup more effectively and comfortably covers the male anatomy, while a full range of sizes - Hog, Trophy and Mongo - will help you achieve a perfect custom fit.

For those who need more give in their protective cup, go for the FLEX. Originally designed for MMA fighters, this cup is designed for even more comfort and flexibility.


  • Constructed of the same materials used in bullet-proof glass and military protective gear
  • Unique anatomical shape provides superior protection - a.k.a. Protecting the Boys®.
  • Flexible, rubberized edge for comfort and fit
  • Vented for additional comfort

In order to provide the utmost comfort and protection the Nutty Buddy, we recommend you wear your flex cup worn as a three piece system. To wear correctly, first put on compression base layer. Place jock and cup over the compression wear. Note: compression base layer and jock sold separately.



Cup Depth: 2.5"
Cup Length: 7.18" 
Cup Width: 4.35"
Body Height: 6'2" and up
Body Weight: 210 lbs and up


Cup Depth: 2.375"
Cup Length: 7.03" 
Cup Width: 4.11"
Body Height: 5'8” – 6'2"
Body Weight: 170 - 210 lbs


Cup depth: 2.25"
Cup Length: 6.83"  
Cup Width: 4.0"
Body Height: 5'4” – 5'8"
Body Weight: 130 - 170 lbs

UMPIRES: Learn How To Wear Your Nutty Buddy Cup & Jock System Like A Pro

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Personal use item return policy

Product Video

ESPN Nutty Buddy Video from Sports Science

Inventor Mark Littell tests the Nutty Buddy Protective Cup with a 90+ MPH baseball on Sports Science.


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Official Reviews


Jason B.

Vancouver, WA

October 9, 2020
Have used the first version for years. Was never happy with the comfort, but liked the protection over the regular cup. The new style is much more comfortable. Would recommend it to anyone.

Chris G.

Lincoln, NE

January 4, 2020
Added the first version to my umpire bag 5 years ago. I will never trust another company to protect the goods. This is by far the best protector on the market. It offers maximum comfort and protection. I have been hit multiple times and the cup has always done its job.

Lance S.

Tucson, AZ

December 14, 2019
Fit is great, just follow manufacturers' suggestions on how to properly wear, and you will be very happy. The fit is a little different since the cup is meant to "free float" in the jock, and you need to wear a separate pair of underwear. Don't hesitate!! Just get it.

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Questions About This Product

Q: Will the Smitty Grey Compression Tights work with the Nutty Buddy?
– Michael Hogg

While the NuttyBuddy cup can be placed into the cup pocket of the Smitty Grey Compression Tights, it is not recommended. This flex cup is designed as a part of a system with the NuttyBuddy Jock and Lock Core compression shorts. See the details HERE.

– Ty Unthank
Customer Service Specialist, Pro Umpire School Graduate and Umpire

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