Tuesday marks the NFL trade deadline, and while the same names have floated around for several weeks, there sometimes seems to be the one deal that seemingly comes out of nowhere.

That was the case four years ago, when the Carolina Panthers stunned the league and traded star running back Christian McCaffrey to the San Francisco 49ers.

"It was a wild week. I got traded at around 11 p.m. East Coast time on a Thursday, and I remember sitting there with my wife thinking, 'This is insane.' I didn’t know I was getting traded," McCaffrey recalled in a recent interview with OutKick.

The Panthers originally wanted to hold on to McCaffrey, who was 26 years old at the time, but when the Niners came calling with an offer of four picks, the Panthers couldn't say no.

"I know how the business is," McCaffrey said. "It's nobody's fault. Things happen in the NFL."

McCaffrey had spent the week gearing up to play against the Tampa Bay Buccaneers in Charlotte, but instead had to suddenly prepare for the Kansas City Chiefs on the other side of the country. He had to take a flight roughly 48 hours before that game on a Friday morning, abruptly leaving his home.

"I got traded on Thursday night and couldn’t say goodbye to my teammates, which I still regret. I wish I could've, because I was a captain on that team, I loved everyone on that team," McCaffrey said.

The Niners offered McCaffrey a grace period, he said, but that was never an option.

"I was on a flight at 7 a.m. the next day to California, thinking, 'I have to learn the plays as quick as possible,' because my one goal was not to miss a game," he recalled. "I remember getting with Bobby Turner, my running backs coach, for the next 48 hours hours and going through every single play.

"It was a whirlwind. I don't know if I ever even processed it, even to this day... One day, you get rooted cross-country, and that's your life now."

At the time, it goes without saying that McCaffrey had no idea what was next. But a Super Bowl appearance and an Offensive Player of the Year award later, with more Super Bowl aspirations this season, it's worked out.

"But it was the greatest thing that ever happened to me, man. I feel so blessed to be a part of this organization," he said.

"Rhat's why you just have to trust God. You don't know what's going to happen and there's going to be good things, there's going to be bad things. There's going to be things you think are bad end up being incredible. it's why you just have to trust the process and keep the main thing the main thing."