The Killer B's were players on the Houston Astros whose surnames started with the letter B. It also refers to the era of Astros baseball from 1997 to 2005 that saw the team reach the postseason six times in nine seasons with four National League Central division titles, two Wild Card appearances and one National League pennant, which was the most successful era in team history until the 2010s. In fact, from 1994 to 2006, the Astros finished first or second in their division in each year except 2000. Two Killer B's, Craig Biggio and Jeff Bagwell, are in the National Baseball Hall of Fame as members of the Astros.