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Baseball Thumb Guard: What are MLB Thumb Rings?

Baseball Thumb Guard: What are MLB Thumb Rings?

October 13, 2019 | by Brian Duryea | @BatDigest

Let us guess, you were watching a game on TV and you noticed an MLB batter’s thumb ring.

Wait, you asked, is there such a thing as a baseball thumb guard?


Baseball Thumb Guard

Specifically, its a Pro Hitter’s Baseball Thumb Guard used for baseball batters. It’s purpose is to fill the gap between the oval shape of a cupped hand and the perfect cylinder of most wood bats. Hitters, and the company, claim it helps dampen sting on poorly hit balls and increase the girth of the bottom hand grip for a better overall feel. Last we counted, at least 40% of MLB players use one at least occasionally.

The short answser, this:

Pro Hitter Thumb Guard

What's on his thumb?

See on Amazon

(Catcher’s use a different thumb guard).

Baseball Thumb Guard

There are a number of places to purchase the Pro Hitter thumb guard. If you are a prime member, then the cheapest place is on Amazon. Otherwise, check eBay or the Pro hitter site directly.

Price Check it on eBay

A few Google keystrokes later and, baaam, here you are. Short answer: it is a Pro Hitters training aid. It sits between the palm of the top hand and the bat. This device increases the contact with the bat. Many feel the ProHitter gives them more control, better comfort on mishits, and increases their palms contact.

The idea behind the ProHitter thumb guard is to remove the seperation between the hand and barrel knob. This volume filler allows for more consistent pressure on the knob which, in turn, allows for a stronger and more controlled grip. Hard to measure exactly how many use it in the MLB, but no less than 40% of players use it consistently and, likely, well over 70% have tried it.

This Prohitter’s batting training aid made our best gifts for baseball players list too.

Pro Hitter’s Thumb Guard Baseball Guide Gallery

Thumb Guard Baseball

Batting Thumb Guard

MLB Thumb Guard

Batting Thumb Ring

Baseball Thumb Grip

How It Works

First, the Prohitters Batter Training Aid forces the handle of the bat towards the fingers. The volume of the little plastic piece forces the bat handle out of the palm of the hand and, during the swing, keeps the grip where it needs to be.

Second, the Prohitter helps reduce hand sting by taking some of the brunt of the vibration away from the top hand and into the plastic piece. Hitters who suffer from bone and palm bruising will find this a must.

Turns out, as you notice, several MLB players use the little gadget. Pro Hitter claims that more than 50% of big leaguers use it consistently. And based on the number of times we notice it on the hands of players we don’t disagree.

Bat Digest Thumb Grip

We at justbatreviews found the little piece to be very helpful—especially for younger players who tend to overgrip the bat and hold it too deep in their palms. The little gadget was simple to use and relatively inexpensive. They even make some youth versions of the Prohitter which might end up a really good baseball stocking stuffer.

Prohitter doesn’t release any data as to whether the device actually does improve bat grip or bat speed. However, they do claim, correctly, that well over 50% of Major League ball players take the time and effort to have it on their top hand thumb at every at bat—and in our mind that is as telling as any data points they could provide. Next time you watch a game, see how many Prohitters you can spot – we suspect you’ll be shocked how many you find.

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Craig First
1 year ago


Would you be interested in trying out an alternative thumb guard that I just launched? It is similar in functionality to the Pro-hitter but is greatly improved in regard to comfort and performance. The patent pending saddle shape is designed to stay in place on the hand, provides protection against bat sting, as well as positioning the bat forward to prevent choking the bat. The curved upper surface facilitates better swing dynamics, allowing the bat to rotate around the Thumb-per as the hitter swings through the contact zone. Please let me know.

Doug Shumway
Doug Shumway
1 year ago
Reply to  Craig First

I’m 47 year old male that loves baseball. I broke my thumb, three screws in bone. I have a tournament in 10 days and I need some protection. I may not be able to play, but looking at all options. It is on my glove hand, right thumb. I’m left handed. I want to be able to pitch, may need to wear in glove? Also, I bat right handed, so it’s my top hand. However, I may try to hit left handed (bunt only) with injured thumb on bottom.
Anyway, tournament time will be about 3 weeks since surgery. Please help. I don’t want to just coach the bases.

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