※ [本文转录自 NBA 看板 #1J6pcxiY ] 作者: Tendywang (..) 看板: NBA 标题: [外絮] SportVU透视: Aldridge的挡拆防守有问题? 时间: Sat Mar 8 23:39:32 2014 原文网址: http://ppt.cc/aGws 图文网志(附表格): http://leelou.pixnet.net/blog/post/32073083 When we looked at the teammates that had defended the pick-and-roll the best on Wednesday, Mo Williams and Robin Lopez were sixth on the list, but the Portland Trail Blazers were nowhere near the top 10 in team rankings. According to SportVU, the Blazers ranked 26th in pick-and-roll defense through Monday’s games and are up to 22nd after a game against the reeling Hawks on Wednesday. They’ve allowed 1.06 points per pick-and-roll possession overall, even though they’ve been pretty good when Lopez has been the guy defending the screener, allowing just 1.01. That ranks 55th among 134 players who had been the screener’s defender on at least 200 pick-and-roll possessions through Wednesday. Not great, but above-average. Note: All stats included here are through Wednesday, March 5. 在上一篇讨论溜马防守的文章里，针对pick-and-roll防守搭档的排名，Mo Williams和 Robin Lopez高居第6，但是拓荒者全队的数据却连前10名都摸不着边。 根据SportVU的资料，至星期一为止拓荒者面对挡拆时的防守排名第26，加上星期三对战 近来步履蹒跚的老鹰後，也不过上升到第22名，他们每次遇上pick-and-roll的平均失分 为1.06分。虽然他们阵中的Lopez算得上是一名不错的挡拆防守者，每个挡拆回合只会丢 掉1.01分，在134名至少守过200回合pick-and-roll的大个子中，排到第55名，尽管不是 顶尖高手，但也超过平均水准了。 注: 所有数据统计到3/5(三)为止。 But near the bottom of the list is Lopez’s frontcourt-mate, LaMarcus Aldridge. The Blazers have allowed 1.17 points per possession when Aldridge has been the guy defending the screener. Of those 134 players who have defended at least 200 pick-and-roll possessions, only one – Trevor Booker – has a higher mark (1.18). The discrepancy between Lopez’s and Aldridge’s numbers is rather remarkable, because both bigs basically defend pick-and-rolls the same way (though Portland will mix things up a little with Aldridge). While the Pacers drop back with their centers and show high with their power forwards, both Aldridge (most of the time) and Lopez drop back… 但Lopez的前场搭挡LaMarcus Aldridge出现在这份名单的倒数几名，当Aldridge面对挡拆 进攻时，拓荒者平均每次失分高达1.17分，在这134人中只赢过了Trevor Booker(1.18分) 。 Lopez和Aldridge的数据差异相当值得讨论，因为这两名大个子基本上在面对挡拆时都采 取一样的策略(偶尔Aldridge会改变方式)，不像溜马中锋沉退、大前锋跟出去的策略， Aldridge(大部份的时候)和Lopez都选择沉退… http://ppt.cc/uUVa http://ppt.cc/fg16 Who are they guarding? Is it a power forward vs. center thing? The players Aldridge is guarding (Dirk Nowitzki, Blake Griffin, Kevin Love, etc.) are generally more potent offensively than those Lopez is guarding. And the biggest difference in Aldridge and Lopez’s numbers is the field goal percentage that the screener has shot when he has got the ball… But other defenses in the West don’t have the same discrepancy. When the starting power forwards from the other top 10 teams in the West have defended the screener on a pick-and-roll, the opponent has scored 1.02 points per possession. And when the starting centers on those same teams have defended the screener, the opponent has scored 1.02 points per possession. No discrepancy at all. The Suns’ pick-and-roll defense has been slightly better when Miles Plumlee has defended the screener than when Channing Frye has, and the same goes for the Warriors, Andrew Bogut and David Lee. But none of the other nine teams has nearly the difference that we see with the Blazers. 是防守对象造成的不同吗? 毕竟大前锋和中锋对位的进攻者非常不一样，Aldridge防守的通常是更有进攻破坏力的球 员(Dirk Nowitzki、Blake Griffin、Kevin Love等)，而Aldridge和Lopez在数据上最大 的差异来自於对手掩护者的投篮命中率… 不过看看西区其他球队的4号和5号位，并没有这样的差距。 西区前10名的球队中，大前锋对上挡拆时的每回合平均失分为1.02分，同时他们的中锋也 是1.02分，完全一模一样。 确实当Miles Plumlee面对pick-and-roll时，太阳的表现比Channing Frye防守时还要好 一点点，勇士这边的Andrew Bogut和David Lee也是类似的情形，但是没有任何一支球队 像拓荒者一样落差这麽大。 The eye test Watching film, Aldridge doesn’t come across as a noticeably bad pick-and-roll defender. He’s usually in the right position, he doesn’t get caught standing still, or get turned around and lost on possessions (like a couple of bigs in New York). The Blazers track every defensive possession themselves and say that Aldridge grades out closer the league average on pick-and-rolls (and that Lopez still grades out as better). And when we look at the 57 percent that the screener has shot on Aldridge-defended pick-and-rolls, we’re only talking about 132 shots, not the greatest sample size. But Synergy Sports grades him as “poor” in regard to defending the roll man. And it’s not hard to find examples (via NBA.com/stats video boxscores) where he fails to close out and lets an opposing big shoot in rhythm… 直接观看比赛时，很难理解Aldridge的挡拆防守效率这麽差，通常他都能站住有利的位置 ，也不会站着不动或被轻易摆脱(像是纽约的前场大个)。 拓荒者检视所有的防守後表示，Aldridge的挡拆防守接近平均水准(Lopez仍然评价较高) ，何况他的对手投篮命中率57%虽然很高，但这只不过是132次投篮的统计结果而已，样本 空间其实不够大。 可是Synergy Sports还是给予他的挡拆防守"不及格"的评价，而且要找到他防守不力的例 子非常简单，这些影片中对手都有很大的空档可以从容出手。 Example 1: Marc Gasol http://on.nba.com/1jZOIVT Example 2: David West http://on.nba.com/1jZPan3 Example 3: Dante Cunningham http://on.nba.com/1ihbW7Z Example 4: Blake Griffin http://on.nba.com/1ihcfzD You can also find examples of him closing out fine, but other West power forwards grade out better via SportVU. The screener takes more shots and shoots them better against Aldridge than any of the other nine guys listed below (from the other West teams at or above .500), even though they’ve all had to defend Aldridge himself, who has attempted almost 200 more mid-range shots than any other player in the league. 你也可以找到一些防守到位的例子，但是透过SportVU的统计，西区其他大前锋的防守程 度都比他还好。进攻方的掩护者在面对Aldridge时的出手次数和投篮表现，都胜过面对表 格中的其他9名防守者(来自西区其他胜率5成的球队)，而且这些人还得防守Aldridge，一 个中距离出手赢过第2名将近200次的进攻好手。 Right shots, wrong results Again, we’re only looking at 132 of the 5,350 shots that Portland opponents have attempted this season. And the Blazers do force the right shots. The intent of their drop-back scheme is to force the least efficient shots on the floor, between the restricted area and the 3-point line. And 45.4 percent of Portland opponents’ shots have come from there. That’s the fifth highest mark in the league, behind only teams that rank in the top five in defensive efficiency. Portland also ranks in the top 10 in percentage of jump shots that they’ve contested. But their opponents have made 41 percent of those shots between the restricted area and 3-point line, the fourth highest percentage. 其实这是正确的防守策略，只是结果不如人意罢了。再次强调，前面讨论的仅仅是132次 出手的结果，而波特兰本季对手的全部投篮次数是5350次。 拓荒者想做的其实没错，他们的沉退策略目的是迫使对手做没有效率的投篮选择，也就是 介於篮框下和三分线之间的区块。拓荒者的对手有45.4%的出手来自这个区域，这是联盟 第5高的数字，不过比他们高的这4支球队却都能在防守效率排进Top 5的水准，远胜於拓 荒者。另外波特兰针对跳投的防守也很到位，成功对位干扰的比例排在联盟前10名。 (http://leelou.pixnet.net/blog/post/32049455 第一个表格) 可是他们的对手在这个区域的投篮命中率是41%，排名全联盟第4高。 Whether that’s a case of bad luck or because they don’t really contest that well, that’s still just 0.82 points per attempt, which is fine defensively. The Blazers also rank 11th in 3-point defense and second in defending the restricted area. So, in terms of defending shots, the Blazers do a pretty good job, despite the Aldridge pick-and-roll issue. They rank seventh in opponent effective field goal percentage. But they rank 19th in defensive efficiency, mostly because they force the fewest turnovers in the league, just 12.3 per 100 possessions. And they force only 11.3 with their starting lineup on the floor. 不论原因是运气不好或者是他们防守对位时的压迫不足，这些没有效率的投篮也不过就造 成平均每次出手0.82分的伤害而已，即使排名不佳也算的上是不错的防守了。另外拓荒者 在三分线上的防守排名第11，在篮框下的防守排名第2。 因此就防守投篮的部份来说，拓荒者做得还算不赖，即使Aldridge在面对挡拆时有点问题 。他们压制对手的eFG%可以排到第7名，但是回到整体防守效率(DefRtg%)时就只有第19名 了，最主要的原因便是他们迫使对方失误的能力在联盟中殿底，每100次攻势中仅有12.3 次而已，先发五人更是低到11.3次。 In part, that goes back to their pick-and-roll defense. Not only do the bigs drop back (which means that ball-handlers don’t have to pick up their dribble and make a pass as often), but the guards (especially Damian Lillard and Wesley Matthews) don’t apply much pressure up front and can get caught on those screens. No Blazer ranks in the top 80 in steals per game. Still, the Blazers are OK when Lopez defends pick-and-rolls. And it may be that his ability to stop the ball-handler and stay in contact with the roll man that allows his teammates to better defend their own guys. If Aldridge is a step slower, that can have a domino effect two or three passes away. 某种程度上来说，还是得回到pick-and-roll的防守来分析。不只是大个子沉退的策略有 问题(这表示持球者不需要常常停球以及传球)，同时也因为後卫(特别是Damian Lillard 和Wesley Matthews)很少上前对持球者施加压力，还很容易被掩护者所阻挡。因此反应在 抄截的数据上，排行榜前80名完全没有拓荒者的球员。 然而当Lopez在防守挡拆时，拓荒者的表现还算是及格，这可能是由於他能够在阻止持球 者的同时，不忘回头找到空切的掩护者，这使得他的队友更容易守住自己负责的人。反之 若是Aldridge的补防脚步慢了，两到三个传球後防线将会如骨牌效应般被瓦解。 Trending up? The Blazers actually have the No. 1 defense since the All-Star break. That number has been schedule-aided though, as they’ve played the Jazz, Lakers, Hawks, and two games against the depleted Nuggets. It also may have been aided by Aldridge’s absence in the first five post-break games, as they found some defensive success playing smaller and quicker. Aldridge is back and we’re going to find out if the Portland defense is really improved over the next 10 days, when five of their six games are against teams that rank in the top 12 offensively (and the other is against the improved Grizzlies). A five-game trip begins against the fourth-ranked Dallas offense on Friday and we’ll see how well Aldridge contests Nowitzki. 拓荒者的防守会反转向上吗? 他们在全明星赛後防守效率高居第一名，这多少得利於赛程的安排，这几场他们的对手包 括爵士、湖人、老鹰以及两度对上无力的金块。另一个原因可能是Aldridge缺席了全明星 赛後的前5场比赛，使用较小且较快的阵容让他们的防守更成功。 现在Aldridge回来了，我们可以在接下来的10天持续观察拓荒者的防守是否真的有进步， 这10天中他们对阵的6支球队中有5支是进攻效率前12名的队伍(另外1支则是进步中的灰熊 )。 5场客场之旅从星期五对战进攻排名第4的小牛开始，我们将能检视Aldridge可以把 Nowitzki守到什麽程度。 -- 结果Nowitzki这场比赛19投8中，拿下22分5篮板6助攻，率领小牛以103:98击败拓荒者。 --

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※ 发信站: 批踢踢实业坊(ptt.cc) ※ 转录者: reaper317 (114.34.18.245), 时间: 03/08/2014 23:54:46