alleygorithm
player impact + groups
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alleygorithm
player impact and winning groups

NBA analytics grounded in win probability, player impact, and the groups that have actually driven winning.

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WPA-powered analytics from play-by-play data
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Pair•Current season•Through 2026-03-19
Jalen Johnson
CJ McCollum
ATL logo
WAS logo

Jalen Johnson + CJ McCollum

Over 100 shared possessions, this pair has added about +0.017 wins after shrinkage. That is 100th percentile on 2,134 shared possessions, which currently reads as a high confidence signal. This sample is sturdy enough to treat as a real rotation signal.

Rank #12|100th percentile|high confidence|2,134 poss
League percentile99.8th
0th (worst)25th50th (median)75th100th (best)
050100
Better than 100% of pairs. Rank #12 in this window, with 2,134 shared possessions and high confidence.
Impact / 100
+0.017
Surplus
+0.007
Grade
100%
high confidence · grade A+
Context
This sample is sturdy enough to treat as a real rotation signal.
The member average is +0.020, while the group's expected baseline is +0.010.
Surplus read
It is outperforming the member baseline by +0.007.
Member profiles
Jalen Johnson
ATL logo
ATL
+0.006
71th pctl
9,407 posshighOff +0.003 / Def +0.008
CJ McCollum
WAS logo
WAS
+0.034
97th pctl
8,091 posshighOff +0.013 / Def +0.028