Reporters talked to Goodell on Tuesday at a meeting to approve the sale of the Broncos ... with the commish being asked why the league is appealing Watson's six-game suspension.

“Because we’ve seen the evidence,” Goodell said.

“[Judge Sue L. Robinson] was very clear about the evidence," Roger told reporters, adding ... "There were multiple violations here, and they were egregious and it was predatory behavior."

The commissioner continued ... "Those are things that we always felt were important for us to address in a way that’s responsible," the statement read.

Of course, the NFL announced Wednesday they were appealing the 6-game suspension handed down to the former Texans QB.

The NFL Players Association has been critical of the decision to appeal ... saying the league should respect the ruling. But, Goodell flat out says the appeal is their right, so they took it.

“As you know, it’s part of the CBA that two parties had the right. Either party could certainly challenge and appeal that, and that was something we thought was our right to do, as well as the NFLPA," Goodell said.

"So we decided it was the right thing to do.”