Sure enough, Harrison ended his comments by saying Ryan's hurting the Jets by talking too much, and they will lose at least their first two games.
Harrison, the former San Diego Chargers and New England Patriots safety, made an appearance in the "Sunday Night Football" booth alongside Al Michaels and Cris Collinsworth during the Minnesota Vikings at San Francisco 49ers game.
"I love Rex Ryan, and I love his personality, his attitude," Harrison said. "I talked to LaDainian Tomlinson a couple weeks ago, and he told me his energy, his emotion is contagious.
"But the one thing that I'm afraid of with Rex Ryan is all the trash talk that he's doing right now. It's one thing if a player does it, but if a coach does it, it really gives you that added motivation.
"And the Jets have to remember they got the Baltimore Ravens and they got the New England Patriots. They will start 0-2."
Collinsworth noted Ryan's declarations might be on Bill Belichick's bulletin board.
"[Tom] Brady, [Randy] Moss, [Wes] Welker and all those guys are flying under the radar right now," Harrison said. "This is a perfect situation for them because Rex Ryan and the Jets are taking all the attention. This is a perfect situation for Belichick and the boys."