Keselowski believes his performance has improved since his sister moved in with him and began helping him run his foundation. She's 10 years older than he is, and he joked that she is his "mind coach" — a riff on what the Carolina Panthers recently said they've obtained to help quarterback Cam Newton.
Since Nicholas moved in, Keselowski has finished in the top 10 in 12 of the last 13 races. He opened the Chase with a win at Chicago, finished sixth at New Hampshire, and won Sunday at Dover.
"Maybe she's my good luck charm," he said.