Experiment #002 · The Receipts

Kemp vs Mourning

Who was the better player across their real NBA careers? Here's every number behind the answer, and where the evidence runs out.

The Lab Result
Alonzo Mourning
??
vs
Shawn Kemp
??
Sealed until 1 Jan 2027

The score, the Battle Map numbers and the stress test stay locked until the episode drops. Everything else below is the real evidence. Make your own call first.

The Lab cards

Collect the specimens

Every Experiment gets a card for each player. Tap a card to flip it.

From the LAB IT binder

Kemp's cards

Real cards from our own collection. Swipe across, tap one to see it big.

1995–96 FleerShawn Kemp, base card
1995–96 Fleer UltraShawn Kemp, base card
1994–95 Fleer Ultra PowerInsert card
1993–94 Fleer NBA SuperstarsInsert card
“Reign Man” skylineSet and year [CHECK]
1991–92 Upper DeckShawn Kemp, base card
Upper Deck USA BasketballYear [CHECK]
Upper Deck “Slam Dunk”Set and year [CHECK]
Upper Deck “Skylights”Set and year [CHECK]

Zo's cards

The one. Pulled from a pack in '92–93 and worth about $180 at the time.

1992–93 Upper Deck Rookie StandoutsAlonzo Mourning, rookie insert
2000 Upper Deck Black DiamondHeat, die-cut
1992–93 Upper DeckDraft-day rookie card · number [CHECK]
Upper Deck “Future Force”Hornets · set and year [CHECK]
Upper Deck Gold MedalHornets, gold signature · year [CHECK]
1996–97 Upper Deck Defining MomentsHeat, with Tim Hardaway
2002–03 Upper Deck InspirationsHeat #33
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The Battle Map

We split the game into ten battles. In each one, 100 points are shared between the two players: 50–50 is dead even, 55–45 is a clear edge. Bigger battles count more when the totals are added up.

KempbattleZo

Weight: core battles count 3, material 2, supporting 1. Weights were fixed before any scoring.

The receipts

The numbers that decided it, from the locked evidence ledger. Read through, then build your own comparison in the Career Lab below.

Receipt 01Scoring

Kemp could really score

Kemp TS%, 1996 playoffs (20 games).640
Kemp in the 1996 Finals vs 72-win Bulls23.3 pts · 10.0 reb
Mourning TS%, 1997 playoffs.529
Mourning TS%, 2000 playoffs.542

TS% (true shooting) = how many points a player gets per shot, counting threes and free throws. Higher is better.

Edge: Kemp
Receipt 02Rim protection

Zo owned the paint

Mourning block rate, 1998–997.7%
Mourning block rate, 1999–007.8%
Kemp's best prime block rate4.6%
Mourning after his kidney transplant, 2005–0610.2%

Block rate = the share of opponents' two-point shots a player blocks while on the floor.

Edge: Mourning
Receipt 03Possessions

Kemp's leaks

Kemp turnover rate, 1995–9620.4%
Turnovers per game, 1996 playoffs4.0
Fouls per game, 1996 playoffs4.2
1996 Finals Game 132 pts, fouled out

Turnover rate = turnovers per 100 plays he finished. This is why Kemp's scoring edge stays small.

Counts against Kemp
Receipt 04Who lasted

Same value, fewer games

Career games: Kemp / Mourning1,051 / 838
Career Win Shares: Kemp / Mourning89.5 / 89.7
Career BPM: Kemp / Mourning0.6 / 2.2

Win Shares estimate how many wins a player added. Zo matched Kemp's total in 213 fewer games. BPM rates impact per 100 possessions against an average player.

Edge: Mourning
Receipt 05Playmaking

Kemp moved the ball better

Kemp assist rate, 1993–9412.4%
Kemp assist rate, 1997 playoffs14.5%
Mourning's prime assist rate (often under 9%)under 12%

Assist rate = the share of teammates' baskets he set up while on the floor. Useful, not game-changing: neither was a playmaker.

Edge: Kemp
Receipt 06Rebounding

The Reign Man on the glass

Kemp rebound rate, 1995–9620.3%
Mourning's best prime rebound rate, 1998–9917.5%
Kemp offensive boards per game, 1996 playoffs3.3

Rebound rate = the share of all available rebounds he grabbed while on the floor.

Edge: Kemp
Receipt 07Team defence

Two great defences, one anchor

Seattle defence: 1993–94 / 1995–96 / 1996–97101.5 / 102.1 / 102.7
Miami defence: 1996–97 / 1998–99 / 1999–00100.6 / 98.9 / 101.0

Defensive rating = points allowed per 100 possessions. Lower is better. Payton and Karl's pressure built Seattle's; Zo sat at the centre of Miami's.

Edge: Mourning
Career Lab

Compare any seasons

Pick a stat, then pick the seasons. Both careers are lined up by age, so you're comparing them at the same point in life.

Points per game

KempMourning

Bright points are inside your window. Tap or hover for the numbers.

Kemp · –
Mourning · –
Your window, side by side
StatKempMourning

Box-score and rate stats only. The Lab Result weighs a lot more than these (defence, playoffs, role, context), so picking a window here doesn't change the Lab Result. Totals: Basketball-Reference. Block and rebound rate: StatMuse, regular season only. Window rates are minutes-weighted.

Best single games

Career highs

The biggest night each of them ever had, stat by stat. These are one-off games, so they show the ceiling, not the usual.

Regular season
StatKempMourning
Points4210 Dec 1994 @ Clippers5029 Mar 1996 vs Bullets
Rebounds2212 Dec 1995 @ Mavericks221 Mar 1993 @ Jazz · hit 3 times
Assists1220 Mar 1994 @ Hornets76 Dec 1995 vs Celtics
Steals72 Mar 2000 @ Bulls (Cavs)416 Feb 1995 vs Rockets · hit 3 times
Blocks1018 Jan 1991 @ Lakers922 Jan 1993 @ Bulls · hit 8 times
Playoffs
StatKempMourning
Points331 Jun 1993 @ Suns, '93 West Finals G53414 May 1993 vs Knicks, 2OT
Rebounds2030 Apr 1992 vs Warriors · hit 2 times2030 Apr 1995 vs Bulls
Assists628 Apr 1994 vs Nuggets · hit 2 times414 May 1993 vs Knicks · hit 3 times
Steals62 May 1996 @ Kings312 May 1997 @ Knicks · hit 4 times
Blocks726 May 1993 @ Suns922 Apr 2000 vs Pistons

"Hit 3 times" means they reached that number in more than one game; the date shown is the first. Checked against Land of Basketball, StatMuse and RealGM.

The stress test

Before calling it, we check whether the answer holds from four other angles. These don't add points.

PeakSealed
PlayoffsSealed
PortabilitySealed
Who lastedSealed

What we can't know

  • Modern player tracking doesn't exist for either prime, so how many shots Zo scared off is not recorded.
  • Seattle's and Miami's great defences were built by coaches and teammates too. We only credit what we can pin on the player.

Your call

Before the verdict drops: who was the better player? Make your call.

Sources: full evidence ledger (E001–E027) listed here on the live site. Stats are from the Lab's locked Experiment #002 run, 15 Sep 2026.