Rex Ryan (left) and Rob Ryan at the Senior Bowl on Monday. (G.M. Andrews / AP)

Rob Ryan, unquestionably a solid defensive coach, didn’t get an interview when NFL head-coaching jobs opened up and his twin brother doesn’t understand it.

“It was one of, in my opinion, the greatest coaching jobs in the history of the National Football League,” New York Jets Coach Rex Ryan said of his brother’s performance with the New Orleans Saints (via the New York Post). “You go from 32nd in the league, and they were closer to 33rd in the league than 31st, improve 130-something yards a game and 10 points a game.

“He doesn’t get an interview? They had more injuries than any team in the league. He had to make adjustments constantly based on personnel. I just thought it was one of the greatest coaching jobs.”

Is it possible that Rob Ryan’s magnificent mane has something to do with it? That was the buzz earlier this month.

“Maybe that’s it.” Rex Ryan said. “I told him, ‘Dude, how about you go get a haircut? It makes no difference.’ I said, ‘You can wear the Fu Manchu if you’re bald.’ I can’t explain it. Is it the hair? I don’t know. I’m trying to get him to get a haircut. Hopefully, this is one of the things that motivates him to do so.”

Rob Ryan has promised to cut his hair, but not for any silly head-coaching job.

“It is getting kind of long now. Eventually, I’ll cut it,” Ryan told via Fox Sports last week during a New New Orleans Pelicans game.”But not now with the peer pressure. I think I’ll let it grow.”

And when he does cut it, he’ll donate his hair to Locks of Love, a non-profit that provides hairpieces to financially disadvantaged children who have hair loss.

“Well, I mean I’ve done that since I was in Oakland,” Ryan said. “It all started with my daughter. I went to school and one of her classmates needed hair and all that.  So, I’ve donated my hair about five different times to Locks of Love.”