Rookie Davis Thompson tied for Amex lead with Jon Rahm

If Davis Thompson is going to finish off his first career victory at The American Express in the California desert, the PGA Tour rookie is going to have to overcome one of golf's best to do it.

Thompson lipped out a birdie putt on the 18th hole Saturday at the PGA West Stadium Course in La Quinta, Calif., and will begin Sunday's final round tied for the lead with Spain's Jon Rahm at 23-under par 193.

"I feel like I don'