Parlay Builder
Build and analyze multi-leg parlaysHow the Parlay Builder Works
What is this?
The Parlay Builder lets you manually construct a multi-leg parlay and backtest it against historical game data. Pick your players, stats, directions, and lines, then see how often that exact combination would have hit this season.
Building a parlay
| Season | Choose which season's game data to analyze against |
| Team | Select a team to load its roster |
| Player | Pick a player from that team's roster |
| Stat | Choose a prop market (Hits, Runs, Strikeouts, etc.) from batting or pitching categories |
| Direction | Over (>) or Under (<) the line |
| Value | The prop line to test against (e.g. 1.5) |
You can add 2 to 6 legs. Use the + Add Leg button to add more, or the × to remove one.
Reading the results
| Hit Rate | Percentage of overlapping game days where all legs hit simultaneously |
| Days Hit | Number of days where every leg in the parlay hit |
| Total Days | Total overlapping game days where all players played |
| Near Misses | Days where all but one leg hit — shows how close the parlay came |
Day-by-day breakdown
Click any day card to expand it and see each leg's actual stat value, the line tested, and whether it was a HIT, MISS, or DNP (did not play). Matching days are shown first, followed by near misses.
Things to know
- This uses the line you enter, not the actual closing line from sportsbooks — use Auto Parlay for closing-line accuracy
- Only regular season games with "Final" status are included
- DNP days (player didn't play) are excluded from the hit rate calculation
- Changing the season re-fetches rosters so you can analyze prior seasons