Phil Mickelson tried to focus on the positives after a brutal week at the U.S. Open, as he finished round two 11 over par for the tournament.

This remains the only major Mickelson has never won after he missed the cut by eight strokes.

All eyes were on the 52-year-old, who has finished second at the U.S. Open on six occasions, following his return to action in the first LIV Golf Invitational.

Mickelson joined the controversial breakaway series for the opening tournament in London last week, having been out of the spotlight for a period.

Comments Mickelson made about his commitment to the Saudi-backed league prompted outrage and led to him taking time away from the sport.

This was therefore his first tournament back in the United States since the Farmers Insurance Open in January – another event at which he missed the cut.

But Mickelson at least showed some improvement on Friday with a three-over 73, having carded a dismal 78 in the first round.

"It was okay. I had a good day," he said. "I enjoyed the week. I wish I had played better."

Despite his move to LIV Golf, Mickelson appeared to remain popular with the fans in Brookline, and he added: "The fans here have always been terrific.

"They really support all sports, and I love it when we bring golf here because they create a really special atmosphere.

"I missed competing, but I also enjoyed some time away."