Well he did ask Joe Montana for advice.
from tsn.ca:
Before Joe Thornton decided to leave San Jose after 15 seasons and sign a free agent contract with the Maple Leafs, he sought advice from a number of sources - including four-time Super Bowl champion Joe Montana.
Montana had been in Thornton’s shoes, when late in his storied NFL career a quarterback controversy spurred Montana’s trade from the San Francisco 49ers to Kansas City. After taking in what Montana had to say, the 41-year-old Thornton boiled down what he truly wanted in his next club, and why Toronto was the right fit.
“I need to win a Stanley Cup, and I think this is a great team that can do that,” Thornton told reporters on a Zoom call Sunday morning. “It was the hardest hockey decision I've ever had to make, but I truly believe that with the roster they have, with the guys they picked up this offseason, this team is ready to win now and I'm ready to win.”
Full story:
Joe Thornton reached out to football great Joe Montana before picking Toronto Maple Leafs - TSN.ca