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Jon Rahm outlasts rookie Davis Thompson to win American Express by one stroke
The Spaniard will now move up one spot in the world rankings to number three.
Jon Rahm moves into share of the lead
The American Express R3
Davis Thompson takes two-shot lead into the weekend
The American Express R2
Davis Thompson takes two-shot lead over world number four Jon Rahm
The 23-year-old shot a career-low 10-under 62 in the first round.