Former Kiwis coach Frank Endacott said on Tuesday he didn't think Foran had played well recently because he was already thinking about the Bulldogs, who he will join next year.
However, Kearney was not impressed with the implication.
"I think there's been stages where everyone hasn't been at their best and to single out Kieran is pretty ordinary," he said.
"Has he been at his best? Absolutely not. But he's not by himself there, so I don't think he's clocked out early.