By Andrew Gould NBC will begin airing Big Ten football games on Saturday nights next season as part of a new media rights deal completed last year. The network is assembling its broadcast team in preparation for the primetime package. According to the New York Post’s Andrew Marchand, Kathryn Tappen will be the leading sideline reporter. Tappen nearly replaced Michele Tafoya as Sunday Night Football’s sideline reporter before NBC instead chose Melissa Stark. Marchand called Tappen’s status as the successor “known in the industry.” Tappen has covered golf, Notre Dame football, and the Olympics f…