Golf scores: Scheffler wins FedEx Cup playoff opener in a runaway and Jack Whaley claims the U.S. Amateur

MEMPHIS, Tenn. (AP) — Scottie Scheffler was back to his dominant form Sunday, turning a two-shot lead into a runaway in the FedEx St. Jude Championship. He closed with a 4-under 66 for an eight-shot victory, his first in nearly…