By Mark Gregory Momentum is a big thing in any sport. There is no one who has more momentum in NASCAR than Matt Kenseth and the No. 20 Toyota of Joe Gibbs Racing. Kenseth, last season’s winner at Chicagoland Speedway, won the final race of the regular season at Richmond heading into the Chase for the Sprint Cup which begins Sunday in the MyAFibRisk.com 400 in Joliet. The win was Kenseth’s fourth of the season and third in the last six races.