FORT WORTH, Texas (AP) — With one swing met with silence, the PGA Tour got back to business Thursday at Colonial.

Ryan Palmer felt more nerves than usual when he stood over his first tee shot in the Charles Schwab Challenge — the first official shot on the PGA Tour in 90 days — and even more bizarre was making a 10-foot birdie putt on the second hole with no one around to cheer.

The closest thing to a crowd was a few people who watched from behind hedges and a chain fence from a nearby street.

Phil Mickelson made one birdie and instinctively squeezed the bill of his cap to acknowledge a crowd...