8 Athletes · 7 Sports · 100% Improved
There is performance on the field that belongs to you. Every athlete on this page closed that gap.
At 140 lbs, he played outside linebacker on a 5A state runner-up football team — the largest classification in Louisiana. Then he threw discus.
As a junior at 165 lbs, he stepped onto the runway against athletes who outweighed him by 30 to 50 lbs. He placed 2nd at state. As a senior at 175 lbs — still amongst the smallest men competing at regionals and state — 1st at regionals. 2nd at state.
Invented for him.
He couldn’t outweigh them.
Cross Guard® — a mouthguard calibrated to his jaw position — gave him something the bigger athletes didn’t have.
Eight athletes. Seven sports. Every one improved — including a physician-overseen blind study where the athlete didn’t know which guard he wore.
Cross Guard® doesn’t know your age — only your anatomy.
“I never thought a mouth guard was the hack. If it doesn’t work, it’s just another thing in my drawer. It’s not in my drawer.”
“My pace is better and my heart rate is lower. Little aches and pains I’d normally have — they don’t seem to happen as much. Or at all.”
“ChatGPT said I calculated incorrectly — that it didn’t seem possible.”
14 Days to Push Your PR — or Your Money Back.
8 athletes. 7 sports. Every one improved.
Call or Text — 225-614-1441 or email DrKeith@MyCrossGuard.comEvery mouthguard tries to fit your jaw, but how many have helped your performance? Has any mouthguard available — mass-produced or custom — ever focused on the most detail for Pushing Your PR?
Every season you compete without a facilitated jaw position is a season of output that belongs to you — speed, power, endurance, precision — that you’re leaving on the field.
There are three kinds of mouthguards. The mass-produced kind sold at sporting goods stores for twenty dollars — shaped to a generic mouth, calibrated to nothing. The custom kind made by a dental laboratory — better fit, same limitation.
And then there is Cross Guard®. Five hours. One athlete. Your jaw position found. Your guard built.
Every result tracked, verified, or overseen by a physician or coach. 100% improvement rate. 8 athletes. 7 sports. No exceptions.
Athlete Spotlight
Golf — Now Going Pro
With Cross Guard®
One of the longest hitters in women’s college golf.
Freshman & sophomore years of high school. Received a golf scholarship — used the guard throughout college. LPGA pursuit begins.
The guard didn’t change her swing. It changed what her body could do with it.
Every athlete. Every level.
The pressure looks different. The margin doesn’t.
Being a champion starts on a Tuesday when no one is watching.
Cross Guard® was built for that Tuesday — when your best is a B and the only person keeping score is you. Session by session, that B becomes a B+.
That’s not a promise. That’s math.
Push Your PR →Real athlete · Real data · Garmin
One athlete. Nine months of maintaining.
Then the PR moved.
What the colors mean · Garmin Training Status
Classifications by Garmin. Not defined by Cross Guard®.
Before Cross Guard® · 42 weeks
2%
of weeks Productive
With Cross Guard® · 11 weeks
64%
of weeks Productive
Small gains. Every session. That’s the compound effect.
When your training compounds — session by session, week by week.
The reason: your jaw, working with you instead of against you.
33 years in the making.
Push Your PR →Source: Garmin Training Status, ultra marathon runner, Jun 11, 2025 – Jun 9, 2026. Cross Guard® introduced Mar 27, 2026. Garmin Training Status is Garmin’s proprietary weekly fitness classification. Some weekly statuses estimated where screenshot data was partially visible. Other training variables may have changed during this period. One athlete. Individual results vary. Cross Guard® does not guarantee specific performance outcomes.
For coaches & agents
Every program optimizes sleep, nutrition, load management, and technique. One variable stays untouched — and it may be costing your athlete every session.
Cross Guard® identifies a performance variable most programs have never examined. One rooted in clinical science — and the body’s response to how it’s aligned under load. Then builds a custom device for that athlete alone to address it.
8 athletes. 7 sports. Every one reported a measurable gain.
Rebecca — Ultra Marathon Runner
For coaches
Your athlete’s B days get better. Over a season, that’s the difference between a good program and a great one.
For agents
A B+ training athlete is a better-positioned contract athlete. The margin your client gains in training is the margin that moves the number on their next deal.
What makes it different
Every Cross Guard® is built by appointment — and out-of-state athletes are on the plane home within 24 hours. Expedited service available.
Contact Dr. Keith directly →Jaw position affects how your body performs. Cross Guard® is calibrated to each athlete’s unique anatomy — not mass-produced, not boil-and-bite.
For many athletes, the result shows up not just as lost performance — but as discomfort and pain under load they’ve accepted as part of the sport.
Three conditions. Bare teeth. A placebo guard. Cross Guard®. He knew when he had nothing in. Between the two guards, he didn’t know which was which.
A physician oversaw the protocol. Bench press increased 30 lbs in two weeks.
Improvement cannot be attributed to expectation.
Return the guard within 14 days if your measurable performance hasn’t improved — full refund, no questions asked.
No other dental-calibrated performance mouthguard in America offers this guarantee.
One licensed dentist. No shortcuts. Every Cross Guard® is a precision instrument built around your anatomy. Fittings conducted by appointment — contact us to schedule.
Cross Guard® is a precision custom instrument — not a shelf product. The investment is discussed during your free 10-minute consultation, where we confirm it’s the right fit for your situation before any commitment is made. The consultation itself is always free.
Most custom mouthguards are built for protection. Cross Guard® is built for one thing: Pushing Your PR.
Most athletes wear Cross Guard® during competition and high-intensity training. Your fitting session includes guidance specific to your sport and training schedule — there is no single protocol that applies to every athlete.
Cross Guard® is calibrated to your anatomy, not a single sport. Athletes across baseball, cycling, powerlifting, distance running, golf, and throwing events have all seen improvement with the same guard. Your jaw position doesn’t change between sports — your guard doesn’t either.
One athlete’s improvement is a result. Three athletes’ improvement is a program advantage — something measurable to show parents, ADs, and recruiting programs. Roster consultations and multi-athlete fittings available.
Email DrKeith@MyCrossGuard.comExpect a personal call — not a form letter. We’ll reach out shortly to schedule your free 10-minute consultation.
Cross Guard® · For Athlete & Coach Use