During Week 6 of the 2012 regular season, Thom Brennaman was set to call the New York Giants vs. San Francisco 49ers football game instead of Joe Buck, who was scheduled to call the National League Championship Series. Sam Rosen was scheduled to fill in for Thom Brennaman while Brennaman filled in for Buck. However, Fox Sports president Eric Shanks brought up the idea of a two sport, same-day doubleheader if both San Francisco and St. Louis won their divisional series. When St. Louis beat Washington on Friday night, Buck went to San Francisco instead of Washington, D.C. and called both the 49ers football game and the Giants baseball game.