Question: Kerry Dale Earnhardt (born December 8, 1969) is a former NASCAR driver and the elder son of seven-time Winston Cup Series champion Dale Earnhardt, his younger son, which American professional stock car racing driver, began racing for DEI in 2007?
Sentence (from "Kerry Earnhardt"): His younger son, Jeffrey Earnhardt, began racing for DEI in 2007, and currently competes in the Monster Energy NASCAR Cup Series.
Relevant evidence: Yes