Overview

• Griffin carded a seven-under-par 65 in the first round to open a two-stroke lead at Muirfield Village Golf Club.
• Collin Morikawa finished at five under with a 67 to sit second, two shots behind Griffin.
• Only 13 players broke par on Thursday as the course’s dense rough and tight fairways held firm.
• Griffin has earned two PGA Tour titles this season—a team victory at the Zurich Classic and last week’s Charles Schwab Challenge.
• Friday’s second round will cut the field to the top 50 and ties plus anyone within 10 shots of the leader.