Justin Rose conjured a bogey-free 10-under par 62 to grab the first-round lead at Torrey Pines, where Brooks Koepka showed signs of rust but basked in a warm welcome on his return to the PGA Tour on Thursday.

Five-time major winner Koepka's return -- after he jumped ship to the divisive Saudi-backed LIV Golf league that rocked the global game -- had dominated the build-up to the Farmers' Insurance Open.

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