Ethereum sports betting
Ethereum sports betting on OVERDOG works like this: you deposit ETH on Ethereum, Arbitrum, Base or Optimism; it converts to Polymarket's US-dollar stable unit, a balance held one-to-one against the dollar; and you trade sports markets at exchange prices set by traders rather than by a bookmaker's line. Withdrawals go out in crypto — USDC on Polygon or Solana, or USDT on Tron.
Your ether exposure runs one way. ETH is what you send in; it is sold into the dollar unit the moment the deposit lands, and there is no ETH withdrawal route on any network. Everything after the deposit is denominated in dollars — the price you pay for a share, the price it settles at, and the balance you take off the platform.
OVERDOG is an access layer to the Polymarket exchange, not a bookmaker — it sets no lines and takes no side of your bet. Betting is entertainment, not income; stake only what you can afford to lose.
How to fund a bet with Ethereum
Four networks in, one conversion, one dollar-denominated balance to trade with. ETH arrives over several chains and is still the same coin on each, so the only real choice on the way in is where your ether already sits.
Ethereum, Arbitrum, Base and Optimism — the four ETH deposit networks
Those four, and no others. Ether is the native gas asset on each of them, so the same ETH pays for the send wherever you start from. Arbitrum One, Base and OP Mainnet are rollups: they execute transactions themselves and post the data back to Ethereum, which is why a transfer on any of the three costs a fraction of the equivalent on Ethereum mainnet. Each network carries its own minimum deposit, shown on the deposit screen before you send.
Native ether and bridged ether
The four networks above are the ones where ether is the chain's own coin, the asset that pays for gas. Elsewhere, what a wallet labels ETH is a bridged representation of it: on Polygon that is WETH, an ERC-20 backed by ether locked on Ethereum, while POL pays the gas; on BNB Smart Chain it is a pegged token issued by the bridge that carried it there. Neither Polygon nor BNB Smart Chain is an ETH deposit network here — worth knowing before you assume the chain Polymarket settles on must also be the chain you deposit from. Match the ticker and the network on the deposit screen to where you hold native ether.
From ETH to the dollar unit you trade in
Once the deposit lands it converts to Polymarket's US-dollar stable unit, held one-to-one against the US dollar on Polygon. That unit, not ETH, is what every market is priced, traded and settled in — so a funded balance behaves identically whether it arrived as ether or as a stablecoin.
Placing a bet once your balance is funded
From here the funding asset stops mattering. What follows is the same for every deposit asset.
Buying a share in an outcome
Pick a market and buy shares in the outcome you want. Each share is a claim that redeems for $1 if that outcome happens and nothing if it does not, so the price you pay reads directly as the market's implied probability. You are buying from another trader at a price the order book sets.
Selling a position before the market resolves
You do not have to hold to settlement. A position can be sold back into the order book while the market is still trading, whenever there is a bid on the other side — the exchange equivalent of a cash-out. Available liquidity varies by market. The difference from a sportsbook is who sets the price: a book's cash-out is a number the book chooses to offer and can pull at its discretion, while this is a sale into the market's own book at what other traders are bidding.
What a bet costs
A flat 1% OVERDOG fee plus Polymarket's own fees, shown together before you commit. There is no bookmaker's margin inside the price, because the price comes from an order book rather than from a book's line. Network gas on your deposit is separate and goes to the chain.
ETH in, stablecoin out
This is where betting with ether genuinely differs from betting with a dollar-pegged stablecoin, and it is not the difference most pages describe.
The three withdrawal destinations
Withdrawals go to one of three places: USDC on Polygon, USDC on Solana, or USDT on Tron. There is no ETH withdrawal route, including on the four networks you can deposit from. Each destination carries its own minimum and its own network cost, both shown before you confirm; that cost goes to the chain, and OVERDOG takes nothing on a withdrawal. If you want to be holding ether again afterwards, that is a purchase you make yourself.
Ether or a stablecoin as your deposit asset
Both land in the same dollar unit, so the choice only shapes the way in. Depositing ether spends it: you stop holding ETH, and the bet you fund then tracks the market you bought rather than ether's price — if ether runs or drops while a market is open, your shares are worth what the order book says they are worth. Depositing USDT or USDC changes far less, because the deposit is already dollar-denominated and the withdrawal returns dollar-denominated crypto. Funding with ether is convenient when ether is what you have. It is a conversion, not a shortcut.
The taxable moments, in order
Three of them, and the first is the one bettors miss. Converting ether into the dollar unit at deposit is a disposal of that ether: the IRS treats virtual currency as property, and exchanging it for other property means recognising a capital gain or loss against your basis. Second, winnings are ordinary income when you receive them. Third, the USDC or USDT you withdraw is a new position with a new basis. This is not tax advice, treatment varies by jurisdiction and changes over time, and a qualified professional is the right source for your own situation. Betting without an identity check does not remove a tax obligation.
What you can bet with an Ethereum-funded balance
The same board every other funding asset reaches. There is no ETH-only market and no ETH-only restriction — the funding asset decides how money arrives, never what you are allowed to trade.
Match markets
Soccer runs deepest — the Premier League, La Liga, Serie A and the Champions League, with clubs such as Manchester City, Real Madrid and Inter Milan. The North American majors trade as outcome markets: the NFL, NBA, MLB and NHL. Combat sports carry UFC cards, with boxing on the board when a big fight is made, and the esports side lists titles including Counter-Strike, Dota 2 and League of Legends.
Outrights and season-long markets
League champions, tournament winners and award markets suit an exchange better than they suit a book. The price moves as the field narrows rather than sitting frozen on a slip, and there is no house to restrict an account that got in early on the right side.
Betting sports on Polymarket with Ethereum
OVERDOG is an access layer to the Polymarket exchange. Your order goes to Polymarket's own order book; what OVERDOG adds is a betting terminal over it and a crypto funding path — ETH across four networks among them — never lines of its own.
Exchange prices with no vig
Prices come from traders bidding against each other, so there is no bookmaker's margin folded into the quote. That is what no vig means, and it describes how a price is formed — never a claim that a bet will win.
On-chain settlement and what a winning share pays
When a market resolves, winning shares redeem on-chain through Polymarket on Polygon at $1 each, publicly verifiable rather than a line in a private ledger. Losing shares expire worthless.
No identity check, and a wallet you can export
There is no KYC to deposit ETH, place a bet or withdraw — no document upload, no verification queue. The wallet is yours: you can export it and withdraw at any time, so we can't freeze you. And because there is no house taking the other side, betting well never gets an account limited or closed. This is no-KYC rather than anonymity, not a way around a tax obligation.