Underdog Entry Builder
See the true odds behind every board square — sourced from the books' own prices — and build entries from the picks that beat the payout math.
Entry Payout
-
xEV
-
xWin
-
Add Picks To Your Entry
Underdog Entry Builder
Underdog Fantasy has something for everyone. They are best known for their industry-leading NFL best ball contests with prizes as high as $2 million to first place. Underdog runs best ball contests in every major sport, including season-long and playoff formats.
Using industry-leading data and technology, OddsShopper has leveraged as much information as possible in our Underdog Entry Builder tool to help users make the best decisions as possible.
Pick'em contests are quickly becoming popular among sports bettors who don’t have access to legalized gambling or simply enjoy the challenge of this format. Just like pick'em platforms such as PrizePicks, Underdog has nuances that you’ll need to understand before getting in on the action. The differences include the option to make correlated picks and a slightly different hold percentage.
How Does Underdog Fantasy Work?
So, how does Underdog Fantasy work? The site has five tiers to their pick'em contests, all of which have different potential ROIs if you’re playing correctly. The best ROI spot is the three-pick pick'em. That may seem counterintuitive since it requires you to get more selections right to win yet pays less than one with four or more picks. However, the payout structure and the winning percentage you’ll need for your three-pick plays make it the safest way to go on Underdog.
If you’re looking to learn more about Underdog Fantasy, OddsShopper has you covered. Here’s advice on how you can play Underdog Fantasy; and our post on how Underdog Fantasy free squares operate.
What Is the Underdog Entry Builder?
Pick'em boards look simple — more or less, flat payouts — but the sportsbooks have already priced most of those exact player props with real odds. The entry builder reads those prices, strips out the juice, and shows you each square's true win probability. Some squares are traps; some beat the payout math outright. The difference is visible once the books' own numbers are next to the board.
How to Use It
- Browse the board — every priced square with its true odds, filterable by league and market.
- Compare against the breakeven — each entry type has an exact per-leg breakeven (about 57.7% for a 2-pick power play); picks above it are mathematically good legs.
- Build the entry — add legs and watch the entry's combined payout and win math update as you go.
Estimating which squares clear the bar is the whole game — OddsShopper Pro grades the full board with proprietary EV metrics and can generate optimal entries in one tap. Pair it with the optimizer guide, check any single price with the EV calculator, and see the live odds screen for the markets behind the board.
Underdog Entry Builder FAQ
What are true odds on a pick’em board?
True odds are what the sportsbooks’ own prices say a pick’s real chance of winning is, with the juice stripped out. A board square at "more or less" pricing pays a flat multiplier — so a pick whose true win probability beats the payout math is a mathematically good entry leg.
What win probability do I need to break even?
It depends on the entry type. On a 2-pick power play paying 3x you need each leg to win about 57.7% of the time; larger flex entries break even in the 54–56% range. The builder grades every square against the exact breakeven for the entry you’re building.
Do the books really price most of the board?
Most of it, not all. Popular player props are priced by many sportsbooks, which is what makes de-vigged true odds reliable there. Some squares — deep bench players, exotic stats, demons and goblins — have no book market, so there’s no consensus number to grade them against.
Which pick’em operators does the builder support?
PrizePicks is the flagship, and the builder also supports other daily fantasy pick’em operators with fixed payout tables. Peer-to-peer formats price differently and aren’t graded against fixed breakevens.