Silva, 38, went down with a broken leg in the second round of their fight after one of his low kicks was checked by Weidman.
Since it was a TKO due to a broken leg and not a traditional knockout or submission, some fight fans took to the Internet to call Weidman's victory a "fluke."
Weidman, 29, says its a legit victory because he's been working on proper ways to check leg kicks, so putting his knee on Silva's shin was just part of the plan.
"I don’t think it was accidental when you try and check a kick and it works," Weidman said at the UFC 168 post-fight presser. "If I didn’t check the kick, I’d have a bruised leg and he’d pick me part with leg kicks.
"The last fight, the one thing that he really capitalized on was leg kicks," noted Weidman. "It’s probably the most important thing we focused on, stopping his leg kicks. Ray Longo has broken people’s legs with a knee on the shin. I’ve done it a couple of times in sparring. It stops people from kicking. Breaking someone’s leg, I’ve never done that before."
Weidman didn't know he had broken Silva's leg until after the Brazilian collapsed under his own weight.
"When I checked the first kick the first time, I knew it hurt him," said Weidman (11-0), who will next defend his middleweight title against hard-hitting knockout artist Vitor Belfort. "When he threw it again, he threw everything into both of those kicks, and I hurt him a lot. I wasn’t sure it broke until he put his foot down and collapsed."
"It’s over, I won, it’s awesome" Weidman continued, "then I saw he broke his leg. and I felt bad for him."
Silva hasn't officially announced his retirement, but it's unlikely he'll return since he's inching closer to age 40. UFC President Dana White hasn't yet counted him out though.
"He’s an amazing human being," White said of Silva. "Maybe he’ll want to make a comeback, but who knows. We’ll see what happens. I don’t want to count him out. I don’t want to count him in. The important thing is he gets the surgery and heals up.
"I’m a big fan," he continued. "I have been since he came here. It’s one of those crazy things, in a million years, you don’t expect that. That’ll be a tough thing to come back from. H was taken in for surgery within the next hour. Anderson Silva’s been amazing, maybe the greatest of all-time and it’s a s****y way to see him go out."