Busch's career has skyrocketed since signing with Joe Gibbs Racing, while Dale Earnhardt Jr.'s sagging career has hit an all-time low. On Wednesday night, team owner Rick Hendrick had enough, firing Earnhardt's longtime crew chief Tony Eury Jr. in an attempt to salvage the season.
"It's never Junior. It's always the crew chief," said Busch, who wonders when fans might finally blame NASCAR's most popular driver for his slumping start.
Earnhardt is 19th in points and coming off a season-worst 40th-place finish at Lowe's Motor Speedway.
"Eventually, I'm going to be the one that has to answer about how much I lived up to my father's name," Earnhardt said Friday at Dover International Speedway.
And he's ready to take the heat from anyone who wants to take shots - even Busch.
"He's always had a chip on his shoulder for me," Earnhardt said. "I expect any opportunity to throw a jab at me, he'll do it. That's just his personality."
Earnhardt understands that without Eury Jr. around to deflect criticism, it's up to him to find the spark that will jolt the No. 88 into contention for the Chase for the championship.
Earnhardt couldn't say why the pairing with his cousin flopped, but he pointed the finger for the back-of-the-pack finishes at himself.
"I take full responsibility for making some mistakes along the way, especially this year," he said. "I would say I haven't been on my game. I shoulder any amount of responsibility that's necessary and everybody feels is fair."
Team manager Brian Whitesell will call the shots this weekend at Dover. Next week, Lance McGrew, who has previous crew chief experience in the Cup series with former Hendrick driver Brian Vickers, will take over on an interim basis at Pocono Raceway.
McGrew, who was working with Brad Keselowski this weekend, said making the Chase for the championship is still the goal this season.
Earnhardt finished last in the 12-driver Chase field in 2008. This season, Earnhardt is a whopping 203 points out of the 12th place cutoff for the Chase. He's had three top-10 finishes and six finishes of 27th or worse.
Hendrick driver Jimmie Johnson said Eury will work with his team next week on road course testing because crew chief Chad Knaus will be unavailable.
Earnhardt and Eury spent Tuesday and Wednesday testing on the road course at Virginia International Raceway. Hendrick told them he was splitting them up when they returned Wednesday evening.