"It was very, very hard to watch," the retired NFL player said of his younger brother's Chiefs falling to own his former team, the Philadelphia Eagles

I’m sorry for how it ended,” he said during an episode of New Heights, the podcast he co-hosts with brother Jason Kelce, published Wednesday.

The Chiefs tight end, who apologized to the team's fans for his shortcomings in the Super Bowl, said before the game that he hoped to keep playing for the next three years. That plan might change, however, as Kelce talked about retirement and what could lead to that.