The UFC flyweight spoke on Monday night's Off The Ball
Conor McGregor will now take a well earned break for the rest of the year after a testing 2016 which saw him begin the year with defeat to Nate Diaz to beating Eddie Alvarez for the lightweight strap.
The 28-year-old made history by becoming the first fighter in UFC history to hold two belts in two different weight divisions concurrently in front of a sold out Madison Square Garden.
Speaking on tonight's Off The Ball, the UFC flyweight shared his thoughts on the achievement and what he saw in McGregor as a young fighter.
"It's phenomenal what he has achieved but I didn't expect anything less from Conor," he said. "Conor always had something about him [going back] to when I started off.
"He started off around the same time I did, disappeared for a while, but I knew from day one he was something special. He's turned out to be what I thought he could be the minute he walked into the UFC."
He cited the commitment it takes to make it to the top of the sport and what the Crumlin fighter had to do become the best in his field.
"It's hard. The dedication and the hours and hours that go into it and whether you'll be able to slip away from the octagon and do other things when the money doesn't come in at the start. He disappeared for a while and came back onto the scene.
"Everything has changed since then. He just put his head down and concentrated on where he wanted to go. Look what's after happening to him. It's phenomenal. I don't think you'll ever see anything quite like it again in the UFC. He's just one of a kind."
Seery explained that McGregor's fighting style makes fighters nervous and can make them forget their own gameplan.
"Conor panics you into throwing big shots. He overcrowds you. A lot of people have you under the illusion that he's a small 155lbs fighter. He's enormous. I don't know how the man made 145lbs.
"He goes up to lightweight and he's bigger than the champion Eddie Alvarez. He made him throw stupid shots, he played him out of his game and punished him from the word go... He had no answer to the precision punches that Conor had."