CHASKA, Minn. — The wind was gusting at more than 30 mph when the United States team showed up at Hazeltine National on Monday for its first practices of the Ryder Cup week. Some might have seen the blustery conditions as symbolic of the difficulties the Americans face in trying to regain their footing in a competition whose outcome in recent years has tilted toward the Europeans.

Not Phil Mickelson. After assessing the conditions, he called an audible and recommended that his teammates replace on-course work with mental imagery.

“On a day like that,” Mickelson explained Wednesday, “why would you see bad when you can visualize good?”

In 10 previous Ryder Cup appearances, Mickelson has seen more bad than good. As a member of eight losing teams, Mickelson, depending on one’s view, is either the ideal person to identify all the mistakes that have been made or part of the problem.

Common convention holds that the U.S. team member whose reputation rests on the outcome of the 41st Ryder Cup is the captain, Davis Love III, who is back after his 2012 squad squandered a 10-6 lead in singles play on the final day. But with Mickelson’s fingerprints all over this year’s team, it could be argued that his legacy is the one on the line as the U.S. attempts to win for the first time since 2008 and for only the third time since 1995.

This week Mickelson helpfully pointed out the errors made in 2004 by the U.S. captain Hal Sutton, who gave Mickelson and Tiger Woods two days’ notice that they were going to be foursome partners. Mickelson said that had not been nearly enough lead time to grow accustomed to hitting with Woods’ high-spin golf ball.

What he neglected to mention is that he was using new clubs, too, after switching manufacturers a week before the competition. He later told the Golf Channel that he had apologized to Sutton for his remarks and said he “never should have brought that up.”

Mickelson, 46, has a passive-aggressive streak that can be sharper than his short game. In 2014, he was the one who memorably pointed out the error of Tom Watson’s ways while his teammates were still numb from their third consecutive defeat to Europe. Mickelson sat on the dais in Scotland and earnestly eviscerated Watson, who was seated a few feet away. Each criticism was a stinging blow that Watson stoically absorbed.

Mickelson rejected the notion that his leading role as an agitator had thrust him into the white-hot center of the spotlight.

“I don’t necessarily agree with that,” said Mickelson, who had earlier cautioned against becoming too fixated on Sunday’s final standings.

“You don’t want to get too tied up in the results,” he said, “but certainly what we’re looking at is, are we able to play our best golf? That’s the whole point.”

Mickelson, who will play with Rickie Fowler against Rory McIlroy and Andy Sullivan in the second alternate-shot foursome this morning, is an outgoing, older-brother type who plays by feel and feeds off emotion, with the clout that comes with five major titles and 51 professional victories, including 42 on the PGA Tour. He comes across as the kind of player captains would like to clone for team events.

And yet, strangely, he has seldom been at his best in the Ryder Cup. In his 1995 debut at Oak Hill Country Club outside Rochester, New York, he was a perfect 3-0-0 in a losing cause. In nine subsequent appearances, his combined record is 13-19-6. He has also competed in 11 Presidents Cups.

In one of his daily news conferences this week, Love mentioned Mickelson by name 15 times, and that did not count his response to a direct question about Mickelson. Love said that he had been addressing the U.S. contingent Tuesday night when he had noticed that Mickelson was leaning forward in his seat, eager to say something. So Love ceded the floor to him.

“Nobody has seen more team golf on our team than him,” said Love, who described Mickelson as “kind of the backbone of the team.”

Brandel Chamblee, a Golf Channel studio analyst, used different language to describe Mickelson’s Ryder Cup role.

“There is a sense that even though Davis is the captain, that Phil is running the show, which is, along with Tiger on the task force, a bit like letting the men who continually have sunk the boat rise to captain of the boat,” Chamblee wrote in an email.

Chamblee added that in 2008, the last time the U.S. won the Ryder Cup, captain Paul Azinger was fortunate. Because an injured Woods was not on the team, Chamblee said, Azinger “only had one almost uncaptainable player to deal with.”