It was the 2012-2013 season. If you measure it by bench scoring, our bench averaged an NBA low (by a huge margin) 18.5 ppg (Indy was second worse at 24.1 ppg). But that doesn't tell the whole story, if you look at bench Deff (efficiency differential), we were dead last at -17.7 (Indiana was second worse at -9.4).
Here's how our bench scoring and bench Deff have progressed over the last 4 seasons:
2012-13:
Bench Scoring = 18.5 ppg, Rank = 30th
Deff = -17.7, Rank = 30
2013-14:
Bench Scoring = 23.6 ppg, Rank = 30th
Deff = -8.4, Rank = 27
2014-15:
Bench Scoring = 27.4 ppg, Rank = 27th
Deff = +1.4, Rank = 11
2015-16:
Bench Scoring = 34.4 ppg, Rank = 19th
Deff = +5.5, Rank = 4th
Note: We still don't have an exceptionally high scoring bench (although it's MUCH better than 4 seasons ago), but I think that is by design. Stotts always leaves one of Lillard or C.J. on the floor so we have one big time scorer on the floor at all times with the ball in his hands. So, although C.J. is a starter, he's the number 1 scoring option with our second unit. Since Deff also includes, rebounding, shot blocking, passing, field goal percentage, etc., guys like Ed Davis, who isn't a big time scorer, but is one of the best rebounders in the league off the bench, have a significant impact on our bench Deff ranking.
What I really like is the progression. We went from a historically bad bench (the worst in league history) that was a huge liability and incapable of holding a lead, to a bench that is a big asset and regularly increases our leads. I mean look at that Deff progression, from 30th (by a HUGE margin) to 4th in the entire league. I'd say Neil has done a great job upgrading our bench and Terry is doing a great job utilizing those guys in combinations that maximize their individual skill sets.
We're still not the Spurs (42.0 ppg, +13.1 Deff), but we're a damn sight closer than we were just two years ago.
All stats courtesy hoopsstats.com.
BNM