Johnson leads field at Riviera

LOS ANGELES — No. 1-ranked Dustin Johnson leads a strong field at Riviera for the the Genesis Invitational, which tees off Thursday. Eight of the top 10 in the world are playing. Tiger Woods is the tournament host, but will not be playing as he recovers from a fifth back surgery. Riviera is the course Woods has played the most times (11) without ever winning.

Johnson has won or been runner-up in seven of his last nine tournaments worldwide.

The top 50 in the world ranking this week are eligible for next week’s World Golf Championship in Florida.