It's just over three years since "Irish" Andy Lee claimed the WBO middleweight title from Matt Korobov in Las Vegas.
The undefeated Russian boxer was never going to be an easy opponent for Lee, and, it didn't take long for fans of Lee to worry that his chance at becoming a world champion was slipping away.
Looking second-best in his attempts to control the fight, initial worries soon disappeared. Catching Korobov with that right-hook, eighteen unanswered punches left the referee with no choice.
A TKO on the cards, Andy Lee was the "champ".
In the three years since, Lee's boxing career has not developed how he would have liked. Yet, boxing's loss is our gain - Lee has become one of Ireland's most fascinating boxing pundits.
Speaking in the wake of Katie Taylor's first successful defence of her own world title, Lee was in typically intriguing form.
After watching Taylor successfully carry out her first title defence, Andy Lee identified one area that Taylor must address if she is to improve further; defence.
The Bray native dominated the first half of the fight, probably winning round's one to five, but the tide started to turn in round six as McCaskill began to plant her feet and load up on her go to shot: the right hook. It appeared to pay off as the American landed landed clean with a left hook this time, wobbling Taylor on the ropes midway through the round.
Andy Lee was a guest on Newstalk's Off The Ball tonight and he saw enough chink's in her armour that Taylor can improve on,
She did get caught at one stage with that left hook and had a little wobble.
It was always going to happen at some stage in her career, it was the first time she has really been hurt.
I was more concerned from what I've seen from her past fights. It was just a lack of defence, she doesn't even consider being defensive or consider taking a defensive posture or anything and that is worrying because she is going to have to continually step up in opposition, the challengers are always going to be better than the last, now that she is world champion.
She is going to have to try and improve that part of her boxing.
The 31 year old dug deep to close out the round, but McCaskill looked to capitalise on Taylor's wobble as she turned up the heat, walking Taylor opponent against the ropes. It turned out to be the American's most fruitful round as Taylor was deducted a point by referee Howard Foster thus giving McCaskill a 10-8 round,
She is never afraid to take a punch and credit to her, she has a great chin. That was the first time she has ever looked hurt and I think a little bit of it was, she was off balance, her legs kind of tangled as she took that left hook.
She has always been willing trade but it professional boxing the gloves are smaller, the rounds are longer, 10 rounds, she is going to have be a little bit more careful I think.
Lee stressed that he does not want to be critical of Taylor but he is worried that she still has habits from her amateur day's like her slick side-step,
In amateur boxing you know its in the instant, it's from moment to moment and your reaction, with professional boxing it's dragging the fight out, taking your time, using her jab, after the first round she kind of neglected using her jab at all and was reliant on her faint's.
Her only defence is a side-step where she punches and hook's and turn's off the hook, its a sidestep hook which she has been doing since amateur's. I don't ever want to be critical of Katie Taylor but I am a little bit concerned not that she is progressing, but not really learning.
In Taylor's defence, her professional career is only in it's infancy. Among her many positive attributes, it is only natural that she will not yet be perfect in every aspect of the fight game.
Listen to Andy Lee on Newstalk here.
