Collin Morikawa’s up-and-down opening round at the 108th PGA Championship played out in much the same way as his 2026 season. The 29-year-old Cal grad mixed five birdies with four bogeys and shot a one-under 69 on Thursday at the Aronimink Golf Club in Newtown Square, PA. Low scores were hard to come by and Morikawa is just two strokes off the lead, in a 19-way tie for 15th place. Among seven players who share the lead at minus-3, only world No. 1 Scottie Scheffler is ranked among the top-30. Morikawa birdied the 17th hole to join a logjam that has 33 players within two strokes at the top of the leaderboard. Morikawa ended a more than two-year victory drought with a win at the AT&T Pebble Beach Pro-Am this season and has five top-10 finishes. That has elevated Morikawa to No. 5 in the world rankings, even as he has battled back issues in recent weeks.…