Right-hander Brandon Pfaadt served up the first career home run to the Giants’ Christian Koss — a grand slam in the second inning — and the Arizona Diamondbacks trail, 6-3, in the bottom of the fifth on Tuesday night,

Every division game in the hyper-competitive National League West will be crucial, as four teams sit above .500 as we enter a new week of MLB.

Kansas City Royals veteran right-hander Michael Wacha had allowed no more than three earned runs in any of his previous six starts before Monday -- yet had just two victories to show for his efforts.

Christian Koss hit a grand slam for his first home run in the majors, and the San Francisco Giants beat the Arizona Diamondbacks 10-6 on Tuesday night to snap a four-game losing streak.

Koss performed a relatively rare feat Tuesday night, hitting a grand slam for his first Major League homer, whose importance went far beyond that morsel of trivia.