Tank Math

highconceptstankinglotteryodds2026-04-11

Summary

Tank math is the strategic calculus behind losing games to improve draft lottery odds. The Nets' experience in 2024-25 illustrates both the promise and peril: they finished with the 2nd-worst record (14% chance at #1) but fell to #8 in the lottery, missing Cooper Flagg entirely. The lottery is a probabilistic game — even perfect tanking doesn't guarantee a top pick. But the Nets' strategy was validated by volume: five first-round picks in the 2025 NBA Draft meant the lottery disappointment was survivable.

Key Insights

  • The bottom 3 teams share equal 14% odds at #1 — there's no incentive to be THE worst, just bottom 3
  • The lottery can drop a team a maximum of 4 spots (worst record can pick no lower than #5)
  • The Nets had the 2nd-worst record in 2024-25 but fell to #8 — a worst-case lottery outcome
  • Despite the lottery miss, the Nets drafted Egor Demin at #8 — who may end up being a franchise player anyway
  • Volume hedge: having 5 first-round picks meant one bad lottery result didn't derail the rebuild
  • The 2019 lottery reform was designed to reduce tanking incentive, and the Nets' experience shows why — the lottery is genuinely random

Details

2019 Lottery Odds (Current System)

Record Rank #1 Pick Top 4 Pick
Worst (1st) 14.0% 52.1%
2nd worst 14.0% 52.1%
3rd worst 14.0% 52.1%
4th worst 12.5% 47.9%
5th worst 10.5% 42.1%

The Nets' 2025 Lottery Experience

The Nets finished 2nd-worst, giving them:

  • 14.0% chance at #1 (Cooper Flagg)
  • 52.1% chance at top 4
  • They fell to #8 — outside the top 4 entirely

This was the worst realistic outcome. But the rebuild survived because:

  1. Egor Demin at #8 has franchise-player upside (6'8" point guard, set rookie records)
  2. The Suns pick (#19) and Knicks pick (#26) provided additional first-rounders
  3. The Rockets pick (#27) and another trade pick (#22) filled out the class
  4. Five first-rounders in one draft means you only need 1-2 to hit

Why Volume Beats Position

The traditional tank assumes: worse record = higher pick = better player. But the 2019 lottery reform broke that equation. Now the math favors having more picks over having a higher pick:

  • One 14% chance at #1 is worse than five chances at getting a good player somewhere in the first round
  • The Nets' 5-pick strategy was essentially: "we'll take our shots across the whole first round"
  • Historically, All-Stars come from picks 1-30, not just 1-5. Nic Claxton was pick #31.

The Anti-Tank Argument (Revisited)

Critics argued tanking destroys culture and fan engagement. The Nets' counter was always: the pick haul is so large that one tank year is enough. And it was — they tanked once (2024-25), drafted the core, and moved on. Compare this to Philadelphia's "Process" which lasted 4 years.

Related

Open Questions

  • Would the Nets' rebuild trajectory be fundamentally different with the #1 pick instead of #8?
  • Is the "volume over position" strategy the new model for rebuilding teams?
  • Should the NBA further reform the lottery to prevent tanking, or does the current system already provide enough randomness?

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