Every one of these games will have some impact on playoff positions or seedings. All times Eastern.
7 p.m., MLB Network, YES Network, NESN: Red Sox at Yankees. Weather permitting, that is. It's Jon Lester vs. Freddy Garcia. Some MLBN viewers will see Rays/Blue Jays. (Or, they all will, if it rains in New York.)
8:15 p.m., CSN Chicago, FSN Midwest: Cubs at Cardinals. The Cardinals are the team trailing the Braves by two games, and they love beating up on the Cubs. For Cubs fans, Starlin Castro needs only one hit to become the youngest Cub in franchise history to have a 200-hit season.