The Denver Nuggets have signed point guard Ty Lawson to a four-year contract extension worth $48 million. The former first-round draft pick enters his fourth season in the NBA as the Nuggets starter at the point. He averaged career highs in points and assists last season, with 16.4 points and 6.6 assists per game. Lawson and the Nuggets open their regular season tonight in Philadelphia against the 76ers. Tip-off is scheduled for 6 PM.