The Yee Yee is a slow-pitch softball bat from Proton, and it is the first Proton bat to wear a camo finish. Under the paint is the part that matters: an all-new Series 4 barrel, a two-piece build, and a 12.75-inch barrel certified for USSSA, NSA and ISA play.
What Series 4 actually changes
Series 4 is a rebuild of how the barrel loads and releases energy. Slow-pitch is a game of repetition — you get four, five, six at-bats a night across a doubleheader, and the bat that wins is the one that behaves the same way every time you swing it.
That is the design goal here. A bigger, more forgiving sweet spot means the ball you catch a half-inch off center still goes somewhere. A barrel that stays consistent means the ball flight in the seventh inning looks like the ball flight in the first. Proton builds the Yee Yee to every bit of pop the rules allow — maximum allowable performance, nothing gray about it.
Two-piece construction and a 12.75-inch barrel
A two-piece bat separates the handle from the barrel. The practical benefit is sting: mishits on the hands, on cold nights, off the end — a two-piece load absorbs that vibration instead of routing it straight into your palms. It also directs more of the swing's energy into the ball rather than losing it in the handle.
The 12.75-inch barrel is the other half of the equation. Length gives you margin. Slow-pitch hitters do not get to guess velocity, but they do have to cover the plate, and a long barrel widens the zone where a swing turns into a result.
Certified for USSSA, NSA and ISA
The Yee Yee is approved for USSSA, NSA and ISA play out of the wrapper. If you run a bat through more than one association in a season — a Thursday league under one sanction, a weekend tournament under another — that matters more than any spec sheet line. One bat, three stamps, no scrambling at the bat check table.
Quick reference on the build:
- Construction: two-piece
- Barrel: 12.75 inches
- Technology: Series 4
- Performance: maximum allowable
- Certification: USSSA, NSA and ISA
- Finish: camo, a first for the Proton bat line
You can see the full listing and current pricing on the Series 4 Yee Yee product page.
Breaking one in
Composite slow-pitch bats want honest reps before they give you everything. Start with soft toss and batting practice, rotate the barrel a quarter turn between swings so you are working the whole circumference, and resist the urge to open a brand-new bat in a cold-weather tournament. A bat that has been broken in evenly performs better and lasts longer than one that got hammered in the same spot for two hundred swings.
Store it inside, not in the trunk. Heat and cold both change how composite behaves, and neither does you any favors on a Saturday morning.
Where the Yee Yee sits at Proton
Proton is probably better known on the pickleball side — a PPA Tour Platinum partner with paddles on the MLP and PPA tours, including Project Coyote, Peacock (Series Three), Roadrunner and Flamingo. The most powerful and lightest paddle yet. But the softball bats come out of the same engineering habit: build the thing to the limit of what the rulebook allows, then make it repeatable.
The Yee Yee is that idea in a camo wrap. If you want to see the rest of what Proton makes, start with the full lineup, or go straight to the Yee Yee if the barrel is what brought you here.
