Davis Thompson takes two-shot lead over world number four Jon Rahm

Davis Thompson took a two-stroke lead over world number four Jon Rahm and four others at La Quinta, California, on Thursday (Mark J Terrill/AP)

Davis Thompson took a two-stroke lead over world number four Jon Rahm and four others at La Quinta, California, on Thursday.

The 23-year-old American shot a career-low 10-under 62 in the first round of The American Express after he birdied three of the first four holes and then eagled both par-5s on the front nine, numbers five and six.