Horn is 30 and not likely to get much better - although he might get a bit smarter.
Horn first got on the scale at 148 pounds, one full pound above the welterweight limit. The fight was never close, as Crawford staggered Horn with a straight left hand from a southpaw stance nearly immediately, setting the tone for a night where Horn's toughness and courage would be commended but his ring skills wouldn't.
Horn clocked in at exactly 147 pounds (66.67kg) - right on the limit - at the weigh-in on Saturday morning (AEST) at the MGM Grand Garden Arena, where the bout will take place.
One of the fight promoters Brad Jacobs, the chief operating officer for Top Rank, declared "Of course we want Crawford to win" and with that admission team Horn are manning the battle stations.
"I never set out to make him a world champion, I set out to make him a legend".
He says Crawford, who has come up in weight after being world champ at 61kg and 63.5kg had grown stronger but retained his speed at welterweight.
"But he's got to do it better than what he done to Pacquiao".
Horn climbed back from a knockdown in the ninth but was all target as the American unloaded another flurry of punches to force local referee Robert Byrd to end what had been a brutal one-way beating. Maybe I was a bit predictable.
"He actually got hurt more against Manny Pacquiao". Both fighters were a little stiff and there was a lot of holding and wrestling early on. Crawford landed 26 of 54 punches in the third round and it was clear he found his rhythm.
The sixth round was as close to a winning round that Horn would see, but Crawford continued to serve a shutout by blocking punches and countering with stinging jabs to the face.
FightNights.com had the fight a shutout for Crawford at the time of the stoppage.
The 30-year-old Crawford, of Omaha, Nebraska, and Horn, also 30, were supposed to fight April 14 at Mandalay Bay Events Center. "He wants to be really respected as a fighter", Rushton said.
"His future is unlimited". "He reminds me of Sugar Ray Leonard and that is a great compliment because I always thought Leonard was the best", gushed Arum.
The fight will be shown live on ESPN + tomorrow night which is the new app ESPN are pushing for $4.99 per month as they move most of their sports content online from television.
Terence Crawford celebrates after defeating Jeff Horn, of Australia, in a welterweight title boxing match, Saturday, June 9, 2018, in Las Vegas.
IBF title-holder Errol Spence is seen by many as the top welterweight, while Danny Garcia and Shawn Porter will fight for the WBC strap in August and WBA champion Keith Thurman is expected to return from injury in September.
Jeff Horn v Terence Crawford pay per view will be broadcast on Foxtel Channel 507.