The Washington Wizards exercised fourth-year contract options on core players John Wall, Trevor Booker, Kevin Seraphin and Jordan Crawford on Friday, keeping that group in tact through the 2013-14 season, team president Ernie Grunfeld announced. The team also picked up the third-year contract options on Jan Vesely and Chris Singleton. Terms of the contracts weren't disclosed, per team policy. "We have been able to bring in and develop this core group of talented, mature young players over the last several years, and we're pleased to have them all signed through next season," Grunfeld said in a statement. "Combining them with the veterans we've added gives us a solid foundation that can be competitive now while allowing us to continue to build towards future success." Wall was taken first overall by the Wizards in the 2010. He appeared in all 66 games and averaged 16.3 points, 4.5 rebounds and 8.0 assists per game.