Six share lead, 12 a shot back at PGA Tour's Charles Schwab

Six players are tied at the top of the leaderboard at the PGA Tour's Charles Schwab Challenge, with a group of 12 players sitting one shot behind the leaders. The tournament is seeing a competitive opening as the field remains tightly packed through the early rounds. Contenders will need to separate themselves from the crowded leaderboard as the event progresses.