Jim Harbaugh said his big decision came down to trophies. To win a Super Bowl, he has to be coaching in the NFL.

Harbaugh visited CBS ahead of the AFC Championship Game. He was asked about his big decision to leave Michigan for another shot in the NFL.

“It was tough. I was torn,” Harbaugh told the pregame show. “I love Michigan, but I love the NFL, too. There’s no Lombardi Trophy in college football. I’ve got (only) so many sands left in the hourglass, and I want to take a crack at that.”

Harbaugh built a championship culture at Michigan. He was asked what kind of culture he looks to build in Los Angeles.

“We word together. We win together. It’s worth it,” Harbaugh said. “The hard work, the sacrifice, the pressure – why would somebody put themselves through that? Because the rewards are just so darn good.”

Harbaugh, who turned 60 in late December, knows the NFL well. He played professionally from 1987-to-2001, seeing his last regular-season action with the San Diego Chargers. He coached in the league from 2011-to-2014, posing a 44-19-1 record. As an NFL coach, Harbaugh made the NFL playoffs in his first three seasons, going 8-8 and missing the postseason in his final season with the 49ers.

Harbaugh came up just short of winning a Super Bowl in 2013. His 49ers fell to brother John Harbaugh’s Baltimore Ravens 34-31.