When the player is on the court - his team wins the portion he is on the court or loses - this number provides the win percent of said player. This is really not that hard to understand.
The specific definition from 82games is - These stats represent how the team performed while the player was on the floor.
The team won only 38% of the stretches when Sergio is on the court - compared to 55% for Travis or 65% for Blake or 55% for Rudy.
The numbers show that Sergio (or Frye) are the most harmful to the team's win percent of the guys that actually got to see at least 60 games of action. If you want to look at something like 1000 minutes as a real measure of a regular rotation guy - Frye does not match this criteria - and makes Sergio the worst of our "regular rotation" guys when it comes to win%.
With this in mind - it seems rather reasonable to expect an upgrade in the backup PG position and upgrade in the backup PF positions to be at the top of the wish list for the team. Upgrade at backup PG can come either from getting a new starter and sliding Blake to backup, hope that Bayless progresses as the designated backup or assume that Sergio (who does not sound like he wants to stay) remains and takes a big step forward in his production. I will be shocked if Sergio is still on the roster - but who knows.
Upgrade at backup PF can come either from the return of Webster and sliding Travis to play only at backup PF - or from removing the glut at SF and shipping either Webster or Travis while bringing a backup banger PF.
So what you are
re-naming is the +/- for each player, which notes the point differential (not victories or defeats, as portions of games cannot be won nor lost) and
which is in reality a measure of the 5 players who are on the court vs the 5 opposing players who are on the court. In no way does it accurately measure singular players. In no way is it reliably comparable to other players.
If Sergio played in Blake's starting spot, his number would be greater than Blake's is now and Roy's would likely be higher also. PT is a huge factor in the +/- also, as most players need a minute or 2 to get in the flow and create, so bench players with a coach who juggles rotations and minutes frequently will always get a lower score, but again it is a 5-man vs 5-man score, and cannot be used to rate a singular player. Players are at the mercy of their coach as to when and for how long they play, and what instructions they must follow (run, don't run, feed the post, just rebound and do nothing else...) so a bad coach could skew things beyond sense.
A more reliable comparison is apples to apples, such as I pointed out the day Blake came back from his injury and Sergio had been starting in his place although still playing less minutes overall. This comparison had each player in the same lineup, both facing starters in the opposition. Apples to apples.
Even though it was a new and unfamiliar lineup, the team had a marginally higher win % with Sergio starting than they had with Blake starting. I think it averaged out to 4 more wins per season when extrapolated to 82 games.
Clearly, Sergio is more valuable to this team's success than Steve is. Steve's best games were after he returned to start, and stepped up the pace for awhile
ala Sergio, but he quickly regressed back to the dawdling, non-creative, risk-free style he's been anchored to for his entire career.
