Kyle Busch, who was replaced by Earnhardt at Hendrick Motorsports, said the Eury-Earnhardt combination hasn't been clicking since last summer.
Busch's career has skyrocketed since he went to Joe Gibbs Racing, and he didn't seem to have much empathy for Earnhardt's struggles. Busch said it's time for Earnhardt to produce and no excuses are left if he keeps struggling.
"If Junior doesn't run well, he's going to be the problem," he said. "It's never Junior. It's always the crew chief."