Kelvin Gastelum easily handles Vitor Belfort, calls out Anderson Silva

The middleweight division continues to treat Kelvin Gastelum very well.

Gastelum (14-2) improved to 4-0 in the UFC's 185-pound division on Saturday, as he knocked out Vitor Belfort with a straight left hand at 3:52 of the opening round. The fight headlined UFC Fight Night in Fortaleza, Brazil.

The 25-year-old Gastelum has looked spectacular at both middleweight and welterweight, but has had trouble making the 171-pound welterweight limit. After knocking out Belfort, Gastelum said he'd stay at middleweight to fight Anderson Silva this summer.

"There's a guy, really close to me, who started a 'legends ass-whipping tour,'" said Gastelum, referring to former UFC middleweight Chael Sonnen. "I want to finish that. June 3, I want go against Anderson Silva, maybe in [Rio de Janeiro]. Who knows?"

Belfort, 39, also expressed interest in fighting on June 3 in Brazil. There is a UFC 212 pay-per-view on that date at HSBC Arena.

"Kelvin was the better fighter tonight, and he landed shots I wasn't expecting," Belfort said. "I have one fight left on my contract. I want to do that fight at home, in Rio."

Belfort (25-14) didn't look bad against his much younger opponent, but his defensive speed is not what it once was, nor is his chin.

He wowed the Brazilian crowd with several spinning kick attempts early on, but Gastelum did well to block them. A blistering 1-2 combination down the pipe put Belfort on wobbly legs and then a straight left put him down hard three minutes in.

Belfort managed to work back to his feet quickly and tried to back Gastelum off with a flurry. Gastelum patiently tracked Belfort down and landed another two-punch combination that brought in referee John McCarthy.

As a middleweight, Gastelum now has finishes over Belfort, Tim Kennedy and Nate Marquardt. He is 5-2 as a welterweight.

Shogun Rua enjoys first knockout victory since 2013

Light heavyweight Mauricio "Shogun" Rua (25-10) flashed some vintage form in a third-round TKO over Gian Villante (15-8). The finish came at the 59-second mark, after Rua rocked Villante with a counter right hand and flurry along the fence.

Villante, of New York, staggered Rua with an uppercut in the first round and had steady success with the jab, but he repeatedly walked into Rua's right-hand counters. It finally cost him big in the third, as he looked to turn up the pace on his legendary opponent.

Rua's face wore the effects of Villante's jab, but he was successful in defending several takedowns and never appeared to be hurt outside the first round. When he put Villante in trouble in the third, he was relentless in his pursuit for the finish.

The win marks the third in a row for Rua, 35, his first thee-fight winning streak ever in the UFC. It is his first knockout win since 2013.

Barboza unleashes wicked second-round knockout

Brazilian lightweight Edson Barboza (19-4) added another chapter to his already-unbelievable highlight reel, as he knocked out Beneil Dariush (14-3) with a jumping knee at 4:35 of the second round.

The knee landed as Dariush ducked in for a takedown. Barboza, who had just eaten a jab to the face, leapt into a perfectly timed counter knee that put Dariush out cold. It is the 11th knockout of his career.

Dariush, who fights out of Southern California, executed his game plan well to that point. He chewed up Barboza with leg kicks early and found a frequent home for the left hand. Barboza landed as well, but Dariush's pressure was a huge factor.

The one knee upended Dariush's night and snapped a two-fight win streak. Barboza, 31, now has won three in a row.

Flyweight prospect Borg picks up career win in enemy territory

Flyweight Ray Borg (11-2) carved out a decision win over Jussier da Silva (19-5), earning unanimous 29-28 scores from the judges.

Fighting out of Jackson-Wink MMA in Albuquerque, New Mexico, Borg, 23, landed shifty uppercuts and hard elbows on the ground en route to his fifth UFC win. He struggled to take da Silva down but managed to stay slightly ahead of him on the cards.

Da Silva, who fights out of Rio de Janeiro, took Borg's back in the third round and secured a tight body triangle, but Borg eventually turned into the position and ended up on top. The reversal was key in winning him the fight, as he finished the round in top position.

Borg has won five of his past six.

Lee continues to rise through 155-pound ranks

Lightweight prospect Kevin Lee (15-2) submitted Francisco Trinaldo (21-5) with a rear-naked choke at 3:12 of the second round, putting an end to the Brazilian's seven-fight win streak.

Lee, who fights out of Las Vegas, absorbed some hard shots in the opening round, including a left hand that nearly dropped him. He responded in a big way, however, as he hurt Trinaldo with a high head kick before finishing him on the floor.

The win improves Lee's UFC record to 8-2. The 24-year-old now has finished three consecutive opponents. In his postfight interview, he called out undefeated Dagestani Khabib Nurmagomedov.