The logic is that a floor spreader is one that punishes a team for double teaming a player. Basically, it keeps a defense honest. But when you are playing a bunch of players that don’t demand a double team, a shooter like Jimmer doesn’t really help. Then, it becomes more of a one on one. If he played with LMA or Duncan or Kawhi, those are players that get double teamed. When they do, the idea is to kick it out to Jimmer for an open three. If Jimmer shoots at a high percentage, then teams are forced to play those guys straight up or risk giving up a three.
But when Jimmer plays with the same guys that aren’t going to make the roster, those guys get played straight up. When Jimmer was playing against Atlanta, none of his teammates demanded a double team. So his shooting wasn’t a factor in spreading the court or keeping a defense honest. Jimmer wasn’t brought in to be a one-on-one scorer, but effectively, that’s what he was asked to do in garbage time.