A team building sandbox for Underdog Fantasy NFL Best Ball drafts
The 2025 Underdog Fantasy Best Ball Team Builder is an interactive draft-board fueled by the latest ADP data from on-going Underdog drafts. It is designed for build discovery and experimentation as a pre-draft planning tool and live-draft companion.
Here's how it works:
1.1 — Choosing a draft slot filters the board to the top stacks reachable from the chosen draft position based on current Underdog ADPs.
Learn more about the data model
1.2 — The stacking targets box provides more information on the filtered teams including the reachability status of their most stacked players:
- Green: Best 2-Player Stack (excl. RBs)
- Yellow: Limited Reach (ADP conflict)
- Grey: Out of reach
Teams are default ranked on the projected value of their best reachable 2-Player stack.
2.1 — Use the team filters to highlight only the teams you want to target.
For example, planning a build around a Week 17 DAL-WAS game stack from Draft Slot 5.
2.2 — Only players on your selected teams will be highlighted on the draft board.
The green highlight indicates your draft position by round
3.1 — Selecting a player opens a team window with ADP, reachability, and point projection detail. You can also Add or Remove the highlighted player from your build here.
3.2 — The stacking targets box will update to reflect stacks and correlation in your build as players are added or removed.
- Rostered players are filled in green
- Highlighted teams indicate # of players in your build
Points shown represent projected points rostered
4.1 — The expandable Build panel shows more detail across 3 tabs:
All players
Distribution across teams
Weeks 15–17 correlation
Superflex
The Superflex Team Builder is available here.
ADP Trends
Use the 2025 Underdog Fantasy Best Ball Average Draft Position table to explore the latest ADP trends from on-going Underdog Drafts.
Cheat Sheet
The 2025 Underdog Fantasy Best Ball Stacking Cheat Sheet provides quick reference to league-wide stacking opportunities and late-season correlation based on the latest ADP and Point Projections from on-going Underdog Drafts.
Data Updates
Projection data and ADP are updated twice weekly—on Tuesdays and Fridays—to reflect the most current draft trends.
Learn More
Learn more with a deep dive into the data and model behind this site.
Other Best Ball Resources
Here is some further reading on best ball — it includes content from other sites for all levels.
Contact
Best Ball Team Builder is an independent project. Underdog Fantasy is not affiliated with or endorsing this tool.