Clark is averaging 10.6 points per game and shooting more than 10 percent worse from the field. He's also taking more than three fewer shots.
“He's just got to keep working,” Kruger said. “There's not any shortcuts or ways to get around that. He's just to keep attacking.”
Clark is getting to the free-throw line at less than half the rate he was before his recent slump (5.7 to 2.1 per game).
But Clark's struggles haven't hurt the Sooners in the win column.
Oklahoma is 5-2 in its last seven games, with wins over three top-12 teams and losses only at Kansas State and Iowa State.
While Clark's production has slowed, Buddy Hield and Ryan Spangler's scoring load has increased.
And Spangler's gritty attitude is spreading to his teammates.
“As a group, they're just benefiting so much from what Ryan is doing,” Kruger said before the game at Iowa State. “I think we're getting tougher. We've still got to be more physical — we've still got to get tougher — but we've grown a lot because of what Ryan's doing on the boards and in every other way.
“He's just kind of raising everyone's bar a little bit, and guys are responding well to that.”