The Colorado Rockies are a Major League Baseball (MLB) team based in Denver, playing in the National League West and owned by the Monfort brothers. They joined MLB as an expansion team in 1993, initially playing at Mile High Stadium before moving to Coors Field in 1995, a ballpark famous for being hitter-friendly and home to the "Blake Street Bombers" (Dante Bichette, Vinny Castilla, Andrés Galarraga, and Larry Walker). The team has reached the postseason five times, always as a Wild Card, with their crowning achievement coming in 2007 when they won 14 of their final 15 games—including the dramatic "Game 163" tiebreaker against the Padres—to capture their only NL pennant, though they were subsequently swept by the Red Sox in the World Series. Despite that success, they hold the worst all-time winning percentage (.456) among active MLB franchises and are one of only two teams never to win a division title, making them the sole Denver major pro sports franchise without a championship. The name "Rockies" reflects the nearby mountain range, and their spring training home is Salt River Fields at Talking Stick in Arizona, which they share with the Diamondbacks.