Through four games against the Thunder, Andrew Bogut is averaging 3.0 points and 4.3 rebounds in 14 minutes.
On Tuesday night against the Thunder, he only played 11 minutes.
"He's fouling. He's got 13 fouls in 56 minutes," Kerr told reporters on Wednesday afternoon. "He's almost fouling out of every game in 10 to 15 minutes. He's gotta be smarter with his fouls. We need him out there."
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In his 11 minutes on the floor in Game 4, Bogut registered six points, three rebounds, an assist and a block.
The Warriors were plus-7 when Bogut wasn't sitting on the bench.
"When he's out there we rebound better, we've got a good passer out of the post," Kerr added. "We want to play Bogut more, but he's gotta stay on the floor."
During the regular season, Bogut averaged 5.4 points, 7.0 rebounds, 2.3 assists and 1.6 blocks in 20.7 minutes per game.