Diamond MMA Quad Strap Jock

STS-Jock Diamond MMA Quad Strap Jock Front View

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The Diamond MMA Quad Strap Jock is the ultimate in groin protection for high-impact sports and umpires. It delivers highly effective groin protection without sacrificing comfort.

Designed by award winning designers and Stanford University engineers, the system has been approved by Doctors and Urologists.

Made from military grade elastics and premium construction, the Diamond MMA groin guard system leverages a high performance 4-strap jock system to hold a specially designed athletic cup in place within a perfectly tailored cup pocket. This patent pending system prevents both lateral and vertical movement of the cup. 

In combination with the Diamond MMA Quad Strap jock, the cup stays completely in place with dedicated straps to minimize both lateral and vertical movement. The Diamond MMA high performance cup is used by athletes, the US military, and, of course, umpires


  • Zero Cup Shifting: Quad-strap system keeps cup in place and held down when getting into your baseball or softball umpire stance
  • Elastic waistband with drawstring to provide custom fit
  • 82% Nylon, 18% Spandex
  • Cup NOT included, sold separately


  • Medium 31" - 34" (77 - 86cm)
  • Large 35" - 38" (87 - 96cm)
  • XL 39" - 42" (97 - 106cm)
  • 2X 43" - 48" (107 - 122cm)

Personal use item return policy

Product Video

Diamond MMA Overview

Watch the construction and features of the @Diamondmma Cup & Quad Strap Jock. The Cup, Jock, & Compression Shorts w/ Jock available on Ump-Attire.com

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Official Reviews

February 1, 2024   Verified Purchase
This works well and keeps the cup in place.
April 16, 2023   Verified Purchase
This replaced the old supporter style. It does not move once you have it on. No more adjusting it on the field during a game. It is comfortable and well made with a waist adjustment drawstring.
July 22, 2022   Verified Purchase
My favorite cup and jock. Incredibly comfortable. I have used the Nutty Buddy and love that too. But this set up is just a bit better for me. I spend almost zero time "adjusting."

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Questions About This Product

Q: Does this jock strap fit the Nutty Buddy cup?
– Chandler Hodges

Nutty Buddy recommends that you use the Nutty Buddy cup as the three part system.

– Cortney Anderson
Customer Service Specialist

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WARNING: Participants in any sports activity assume risk of injury. This equipment may be used to help aid in preventing or reducing the extent of injury. No equipment can guarantee umpire or player safety from injury during participation, and use of this equipment carries no such guarantee. Do not use any umpire equipment that is damaged in any way.