LAS VEGAS, NV - MARCH 8: Dana White attends the Power Slap 1 pre-event press conference on March 8, ... [+] 2023, at the UFC APEX in Las Vegas, NV. (Photo by Amy Kaplan/Icon Sportswire via Getty Images)Icon Sportswire via Getty ImagesThe UFC 311 card has taken a hit, and so has Johnny Walkers stock as a light heavyweight contender.The light heavyweight scrap between Walker and Bogdan Guskov is off. Walker suffered what he described as a bad injury that is forcing him out of the fight.Thankfully for Guskov, the UFC has moved quickly to get the hard-charging light heavyweight another opponent. Walker will be replaced by Billy Elekana, a 29-year-old with a 7-1 record.SAN ANTONIO, TX - AUGUST 04: Billy Elekana looks on before fighting Chuck Campbell during PFL 2023 ... [+] week 7 at Boeing Center at Tech Port on August 4, 2023 in San Antonio, Texas. (Photo by Cooper Neill/Getty Images)Getty ImagesElekana is the rare fighter making his UFC debut who didnt earn a spot on the roster through the Dana White Contender Series. If Elekana performs well, he should get an opportunity to join the promotion officially.Guskov is ranked No. 13, so while a tall task, its a great opportunity for Elekana. If anyone is getting a bit of a bad hand, its Guskov. Fighting Walker was an opportunity to move up in the rankings for Guskov. Walker is currently No. 10, but his stock seems to be falling.Injuries can happen to anyone, but the current situation with Walker is the latest setback since he erupted on the UFC scene in August 2018.The 6-foot-6 uber-athletic Brazilian defeated Luis Henrique da Silva on DWCS and then rolled off three straight first-round stoppage wins over Khalil Rountree Jr., Justin Ledet, and Misha Cirkunov.Read More: UFC Vegas 101 Results, Bonus Winners, Highlights And ReactionWalker was being mentioned as the guy who could ultimately dethrone Jon Jones. Yes, it got that serious.After the win over Cirkunov at UFC 235, Walker dislocated his shoulder doing the Worm as a wild celebration. Quite honestly, he hasnt been the same since the mishap.LAS VEGAS, NV - MARCH 02: Johnny Walker of Brazil celebrates his victory over Misha Cirkunov of ... [+] Latvia in their light heavyweight bout during the UFC 235 event at T-Mobile Arena on March 2, 2019 in Las Vegas, Nevada. (Photo by Jeff Bottari/Zuffa LLC/Zuffa LLC)Zuffa LLCSince beating Cirkunov and injuring his shoulder, Walker is 3-6-1. He was promptly stopped by Corey Anderson in his next fight and then lost a unanimous decision to Nikita Krylov.Walker got back on the winning track by defeating Ryan Spann in September 2020, but he went on another two-fight losing streak when he was defeated by Thiago Santos and Jamahal Hill in 2021 and early 2022.It seemed like Walker might be back on track as he reeled off wins over Ion Cutelaba, Paul Craig, and Anthony Smith, but he hit his ceiling in 2023 when he fought Magomed Ankalaev.In a fight Ankalaev looked set to win, Walker said he was unable to continue after being hit with an accidental illegal knee.In the rematch, Ankalaev made quick work of Walker with a second-round KO. Walker met the same fate against Volkan Oezdemir in June 2024.Gone are the thoughts that Walker can be a serious championship contender, and thats crazy considering hes only 32 years old. The recent injury only makes the fading shot at contention all the more unlikely.Is Walker a bust?CHARLOTTE, NORTH CAROLINA - MAY 13: Johnny Walker of Brazil has his hands wrapped backstage during ... [+] the UFC Fight Night event at Spectrum Center on May 13, 2023 in Charlotte, North Carolina. (Photo by Mike Roach/Zuffa LLC via Getty Images)Zuffa LLC via Getty ImagesIf that term can be applied in mixed martial arts, he probably fits the definition as much as anyone in recent memory.Hopefully, Walker can rebound and make a run in his mid-30s. Perhaps he can make some noise at heavyweight. At 66, its not out of the question.