DARKO Creator Unveils WOWY RAPM: Impact Metric Reaching Back to 1980, Ranking Jordan, Bird, Magic
The analytics crowd has a new toy, and this one reaches further back than anything they’ve cooked up before. The developer behind DARKO — the daily player-projection system that has become a fixture in NBA front-office circles — has published a new metric called WOWY RAPM, now live at darko.app/wowy. It estimates single-season player impact using scoreboard data stretching to the 1979-80 season, meaning Larry Bird’s rookie year and Magic Johnson’s first title run now sit on the same leaderboard as Nikola Jokic’s latest masterpiece.
Here’s the mechanic, for those who didn’t grow up eating box scores like cold pizza: traditional Adjusted Plus-Minus metrics rely on play-by-play lineup data, which the NBA only began systematically tracking around 1996-97. That hard cutoff left every player who laced them up before the play-by-play era stranded outside the conversation — unless you trusted box-score-derived stats like PER or BPM, which measure what a guy accumulated, not what happened to the scoreboard when he was out there. WOWY RAPM, short for “With or Without You Regularized Adjusted Plus-Minus,” sidesteps the problem by comparing final score margins in games a player appeared in versus games he missed. The model regularizes those observed on-off differentials across the entire league to isolate individual contribution. The result: 20,563 player-seasons ranked on a single scale, from James Worthy’s bench minutes to Wilt Chamberlain’s twilight.
The leaderboard reads like a hall of fame ballot with a grudge. LeBron James’s 2009-10 Cleveland season tops the all-time list at +8.7 WOWY RAPM, edging Jokic’s current 2025-26 campaign at +8.1. James owns six of the top ten slots. Michael Jordan’s 1990-91 season — the first title year — lands at +7.6, eighth overall, with his 1992-93 and 1987-88 campaigns also cracking the top twenty. Magic Johnson’s 1989-90 season sits 16th at +7.2. Larry Bird’s highest entry, 1987-88, ranks 26th at +6.9.
Where it gets spicy is the defensive column. Victor Wembanyama’s 2025-26 season posts a +4.4 D-RAPM, the highest single-season defensive rating in the entire database — higher than any David Robinson year, higher than peak Tim Duncan. Robinson, meanwhile, appears six times in the top 65, with defensive ratings consistently between +3.5 and +4.2. His 1994-95 season ranks 22nd overall at +6.9, and his 1998-99 campaign carries a +4.2 D-RAPM that trails only Wembanyama’s current mark among the leaderboard entries visible. The Admiral rates considerably ahead of Hakeem Olajuwon, who does not appear in the top 100 — a result that will send a certain generation of fans reaching for the smelling salts.
The DARKO system itself is no stranger to the league. Its flagship Daily Player Metrics page currently lists Jokic at +7.0 DPM, Wembanyama second at +6.4, and Shai Gilgeous-Alexander fourth at +5.6 for the ongoing season. The WOWY RAPM tool operates as a separate historical module, drawing only on observed game-level data rather than DARKO’s projection model. The page notes that it includes both regular-season and playoff possessions, and that average-only rows without a modeled possession total are filtered when bounds are applied.
Now, I’ve got opinions about guys in polo shirts who never took a charge telling me who the great ones were. But I’ll say this: a metric that puts Michael Jordan and Victor Wembanyama on the same axis — and has the math to back it up — is at least worth a look before you dismiss it. The scoreboard doesn’t care about your era, pal. It never did.
Sources
- DARKO WOWY RAPM Leaderboard
- DARKO Daily Player Metrics
- r/nba discussion (original signal)
- Basketball-Reference Glossary (BPM, plus-minus definitions)