Then Gunn faced a new challenge: sustaining success. He not only found the right players to round out his team after losing superstars including Jordan Morris, he studied how multinational companies stayed hungry after big wins.
"When you have some success, you suddenly start to think everything you did was good," Gunn said. "The truth is, you did enough good things but maybe you were a bit lucky. Maybe the climate was right. Maybe the timing was right. So you have to be introspective and constantly seek out ways of improving, and that's what we really did well as a staff and what the student-athletes did."
They did it so well that Stanford beat Wake Forest 5-4 in penalty shootouts in 2016 and Indiana 1-0 in 2017 to secure two more titles. Only Gunn and Virginia's Bruce Arena (1991-1994) have won three consecutive NCAA men's soccer championships.
"He was always the hardest working person in the room, the first guy in and the last guy out," said Tanner Beason, a Stanford defender from 2015 to 2019 who now plays for the San Jose Earthquakes. "Anyone who knows and spends time around Coach Gunn knows that he's extremely passionate and loud and into whatever he's doing."
Gunn also created an "accountability-based environment" in which all the players knew what their jobs were, what their teammates' jobs were, and were expected to set and meet the highest standards. Beason called it the "Stanford mentality."
"It's about giving all that you have, making sure that you're pushing yourself and in so doing, pushing those around you," he said.
Beason was quick to add that off the field, Gunn is a loving, family-oriented man who cares deeply about his players, current and former.
Tobin said it will be "almost impossible" to replicate the three-peat. It's all the more remarkable, Tobin said, because Gunn didn't have the most talented teams at the time. Gunn's incredibly sharp, analytical mind and his refusal to tolerate players not working hard are among his "gifts," Tobin said.
"In most sports, if you've got the best players you're going to win," he said. "He has a gift where that doesn't have to be the case."
Gunn wishes he could go back and enjoy that moment more. At the time, he was simply exhausted. Gunn and his wife, OB-GYN Janet Wiese, have two young sons, Tomás and Sebastián, and Gunn was trying to balance work and family.
"And I was kind of worrying about, 'OK, what do we do next?'" he said. "I kind of wish that I'd taken more time to reflect and smile at a few more people and be happy for a moment."