Complex sentence: Upon arriving in Carolina, Davis was asked by the Ford Motor Company to hire up-and-coming Midwest driver Jeff Gordon, who won the NASCAR Busch Series Rookie of the Year in 1991 and won 11 pole positions the next year.
Split into simpler sentences: Upon arriving in Carolina, Davis was asked by the Ford Motor Company to hire an up-and-coming Midwest driver Jeff Gordon. Gordon won the NASCAR Busch Series Rookie of the Year in 1991, and won 11 pole positions the next year.