|Irish Coffee: Celtics succeed one possession at a time||01.25.11 at 1:58 pm ET|
Wake up with the Celtics and your daily dose of Irish Coffee ‘¦
Over the weekend, I stumbled across a New York Times article that claimed Derrick Rose is a better defender than Rajon Rondo, based on the individual statistical analysis of points allowed per possession:
Rose has allowed just 0.77 points per possession overall on defense this season, an elite mark for any defender, regardless of position. Chris Paul (0.86 points per possession allowed), Rajon Rondo (0.83 PPP allowed), and Russell Westbrook (0.92 PPP allowed) ‘- all excellent defenders -‘ have been trumped statistically this year, and by no slim margin. Rose has each of those players handily beat, and boasts a shockingly comprehensive defensive profile.
My natural reaction: How do I get my hands on these points per possession (PPP) statistics? It turns out Synergy Sports Technology tracks every possession — offensively and defensively — for every NBA player. On both sides of the ball, a team or player’s possessions are broken down into 11 categories: 1. isolations, 2. pick-and-rolls (ball-handler), 3. post-ups, 4. pick-and-rolls (roll man), 5. spot-ups, 6. off screens, 7. handoffs, 8. cuts, 9. offensive rebounds, 10. transitions and 11. all other plays.
Obviously, a player’s PPP offensively doesn’t account for the quality of the pass he’s receiving or the look he’s getting, but it’s a great tool to determine how well he’s performing overall and on which plays he’s succeeding.
Likewise, a player’s PPP allowed defensively doesn’t account for the quality of his help defense or who he’s defending, but it’s an accurate representation of whether or not he’s stopping his assignment as well as on what plays he’s being beaten.
Let’s first break down how efficient the Celtics have been offensively as a team; the first number is where they rank in the league in terms of PPP, and the percentage reflects how often they run each play:
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