The Series 4 WeeHoo/TBE is a signature slow-pitch softball bat built with Anthony Acevedo and TBE Sports. It runs on Proton's Series 4 technology, uses two-piece construction, and carries a 12.75" barrel. It is blacked out top to bottom.
What a two-piece build actually does
A two-piece bat separates the barrel from the handle instead of turning them from one continuous piece. The two halves are joined rather than fused into a single wall.
That separation matters most on contact you did not plan for. Off the end, in on the hands, jammed on a low pitch — the handle absorbs some of what a one-piece design sends straight into your palms. Hitters who play doubleheaders in August tend to notice the difference by the fourth game, not the first.
It also changes how the bat feels through the zone. A two-piece has a little more give at the transition, which some hitters read as whip. If you have swung one-piece bats your whole career, give it a few rounds before you judge it.
The 12.75" barrel and who it fits
Barrel length is a trade. Longer barrels give you more surface to work with and push the sweet spot further out toward the end cap. Shorter barrels concentrate mass and can feel quicker to turn over.
At 12.75", the WeeHoo/TBE sits in the range most slow-pitch hitters live in. It is long enough to reward hitters who cover the outer half and drive the ball the other way, without asking you to fight the bat to get around on something inside.
- Two-piece construction — barrel and handle joined, built for maximum allowable performance.
- 12.75" barrel — a full hitting surface without an unwieldy swing profile.
- USSSA, NSA and ISA approved — cleared for the three sanctions most slow-pitch players show up to.
- Series 4 technology — Proton's newest bat platform.
- Blacked-out signature colorway — the Anthony Acevedo x TBE Sports design.
Why the sanction stamps matter
Nothing ends a weekend faster than a bat that gets pulled at the plate. USSSA, NSA and ISA each run their own approval process, and a bat legal in one is not automatically legal in another. The WeeHoo/TBE carries all three, which means one bat covers most of the tournament calendar for most players.
Check your specific league's rule set anyway. Local associations sometimes layer their own restrictions on top of the national sanctions, and that is on the league, not the bat.
Breaking one in
Composite slow-pitch bats do not arrive at full performance. They get there. The standard approach is dry swings and soft toss before you take it into a game — light contact, rotating the barrel a quarter turn between hits so the whole surface works in evenly.
Resist the temptation to take it to the cage and hammer machine pitching on day one. Cold weather is the other thing to avoid early. Composite is less forgiving in the cold, and a brand-new barrel is at its most vulnerable before it has settled.
Where it sits in the Proton lineup
Proton builds slow-pitch bats and pickleball paddles, and the two lines share a habit: pick a construction philosophy and commit to it. On the paddle side that has produced Project Coyote, Peacock, Roadrunner and Flamingo. The most powerful and lightest paddle yet. Proton is a PPA Tour Platinum partner, and its paddles are used on the MLP and PPA tours.
On the bat side, the WeeHoo/TBE is the signature entry — a player-driven build rather than a catalog filler. If you want the full spec sheet and current pricing, the Series 4 WeeHoo/TBE product page has it. You can browse the rest of what Proton makes at the full collection.
The short version
Two-piece. 12.75". USSSA, NSA and ISA approved. Series 4 tech, Acevedo signature, blacked out. If you hit in sanctioned slow-pitch and you want one bat that travels across sanctions, this is the one to look at.