og15 wrote:The numbers being compared are fairly different. TS% I would say is the best because it's really not an "advanced" stat, it's simply just a combined shooting efficiency stat. It is pretty clear what the stat is saying, it doesn't try to rank players, it's just telling us that this is how effective/efficient a player is with possessions where they shoot (either from the field or the line).
PER is a measure of how well you can fill up the box score with positive stats, it will correlate with the best players since those are almost always the players who will put up the most positive stats, but it isn't a stat that has power for any good comparison. What it is good at is showing how productive a player is / can be per minute, and that has value of it is used correctly.
Win shares like most primarily box score based stats are very bad at measuring defense. Defensive win shares relies on individual defensive rating (not to be confused with on/off Drtg). Individual defensive rating relies on team defensive rating and a player is better (lower Drtg) or worse (higher Drtg) based on how well they grab defensive rebounds, and get steals and blocks per minute. It assumes all players are equally good at non box score defensive things such as deflections, charges, shot deterrence, communication, rotations, etc...you see the problem. So it is why solid defensive rebounders like David Lee who can average a fairly good per minute blocks/steals playing on a great defensive team (eg: Spurs) will be ranked as an elite defender by the stat, but are far from that.BPM is an odd one, you are now mixing regression to weigh the value of different box score stats. Defensive BPM is just subtracting offensive BPM from total. We do also have to understand what it is measuring. It is looking to measure value, not necessarily how good a player is. What I mean is that it is a cumulative stat, so playing more minutes (and therefore likely more games) will increase your number. So a player can have more value to his teams winning for a season vs another guy because he played 20 more games, but he's not a better player. VORP is trying to take away the cumulative part of BPM. So, to calculateleolozon wrote:I don't care much about BPM. According to BPM, Westbrook is a great defensive player. Doncic had a better BPM in his rookie season than Steve Nash in his prime. Come on!
I prefer using WS to BPM or VORP.Value over Replacement Player (VORP) converts the BPM rate into an estimate of each player's overall contribution to the team, measured vs. what a theoretical "replacement player" would provide, where the "replacement player" is defined as a player on minimum salary or not a normal member of a team's rotation.
VORP, the formula is simply: [BPM – (-2.0)] * (% of minutes played)*(team games/82). This yields the number of points the player is producing over a replacement player, per 100 TEAM possessions over an entire season.
BPM and WS are FAR better stats when you take the sum of the two parts and don't look at the offensive and defensive splits.
