I know he banged his knee in practice a while back. It's why he didn't play in the Lakers game.
But then he DID play in the next game against the Warriors so I'm guessing either the knee was still bothering him a bit or he was generally getting some rest on a meaningless game where he wasn't needed anyway.
I mean, why play a 13 yr veteran thug against a preseason Euoleague matchup where the result is a foregone conclusion? Besides trying to start an international incident? Might as well save the old legs.
You know what Barnes brings and does. Team needs to see Temple work with the other PGs and as the PG. Casspi needed time after missing a game against a team from his home country. Need to see what the rooks can do. McLemore probably took most of the minutes and he made use of them.
Shortest version: Lotta wings. Barnes is old. Maccabi.