Complex sentence: He will be riding for the Cresent Suzuki team and will be fighting for the championship as of round one at Brands Hatch Indy Circuit, if he does secure the title he will be the first American to do so.
Split into simpler sentences: He will be riding for the Cresent Suzuki team and will be fighting for the championship as of round one at Brands Hatch Indy Circuit. If he secures the title, he will be the first American to do so.