Welcome to today's edition of Sportskeeda's daily MMA News Roundup, where we present the biggest UFC updates and other stories from the world of mixed martial arts.In today's issue, we talk about a retired veteran admitting to steroid usage, Andrew Tate and Greta Thunberg's unexpected Twitter feud, and more.#3. Donald Cerrone has been taking a lot of steroids since UFC retirementDonald Cerrone is using steroids after retirementDonald Cerrone is "on the good sh*t" since retiring from the octagon this year.'Cowboy' laid down his gloves after a second-round submission loss to Jim Miller at UFC 276. Despite the extended skid towards the end of his career, Cerrone remains one of the legends of the sport.When Cerrone's recent social media posts showed drastic transformations in his physique, fans suspected he was using steroids. Confirming the suspicion, Cerrone went full out listing down everything he was using and even promoted the brand in an Instagram post.He revealed that he's been using PEDs for peptides, hormone replacement therapy, brain health, joint recovery, and more.Take a look at his post below: View this post on Instagram Instagram Post#2. Andrew Tate 'takes an L' from Greta ThunbergFormer kickboxer-turned-internet sensation Andrew Tate stirred up an unprovoked Twitter back-and-forth with environmental activist Greta Thunberg.The self-proclaimed trillionaire tagged the 19-year-old on Twitter, listing down all the cars he owns. He went on to ask for Thunberg's email address to share "enormous emission" details with her.Andrew Tate@CobratateHello @GretaThunberg I have 33 cars. My Bugatti has a w16 8.0L quad turbo. My TWO Ferrari 812 competizione have 6.5L v12s.This is just the start.Please provide your email address so I can send a complete list of my car collection and their respective enormous emissions.18198212611Hello @GretaThunberg I have 33 cars. My Bugatti has a w16 8.0L quad turbo. My TWO Ferrari 812 competizione have 6.5L v12s.This is just the start.Please provide your email address so I can send a complete list of my car collection and their respective enormous emissions. https://t.co/ehhOBDQyYUThunberg responded with a "small d**k" swipe at Tate.Greta Thunberg@GretaThunbergyes, please do enlighten me. email me at smalldickenergy@getalife.com twitter.com/Cobratate/stat…Andrew Tate@CobratateHello @GretaThunberg I have 33 cars. My Bugatti has a w16 8.0L quad turbo. My TWO Ferrari 812 competizione have 6.5L v12s.This is just the start.Please provide your email address so I can send a complete list of my car collection and their respective enormous emissions.2533009418900Hello @GretaThunberg I have 33 cars. My Bugatti has a w16 8.0L quad turbo. My TWO Ferrari 812 competizione have 6.5L v12s.This is just the start.Please provide your email address so I can send a complete list of my car collection and their respective enormous emissions. https://t.co/ehhOBDQyYUyes, please do enlighten me. email me at smalldickenergy@getalife.com twitter.com/Cobratate/stat…In response, Tate uploaded a two-minute video on Twitter to rant about how Thunberg has been turned into a "slave of the matrix" and is being manipulated to protest against the carbon emissions of world governments.Andrew Tate@CobratateThank you for confirming via your email address that you have a small penis @GretaThunberg The world was curious. And I do agree you should get a life twitter.com/i/web/status/1…Greta Thunberg@GretaThunbergyes, please do enlighten me. email me at smalldickenergy@getalife.com twitter.com/Cobratate/stat…13625512549yes, please do enlighten me. email me at smalldickenergy@getalife.com twitter.com/Cobratate/stat…Thank you for confirming via your email address that you have a small penis @GretaThunberg The world was curious. And I do agree you should get a life ❤️ twitter.com/i/web/status/1… https://t.co/SMisajQRcfUFC fighter Chris Curtis reacted to the Twitter exchange, laughing at Tate 'taking an L' before the end of the year.Chris Curtis The Action Man@Actionman513Bro... the year was almost over. He didn't need to take this L... 🤣 twitter.com/GretaThunberg/…Greta Thunberg@GretaThunbergyes, please do enlighten me. email me at smalldickenergy@getalife.com twitter.com/Cobratate/stat…30412yes, please do enlighten me. email me at smalldickenergy@getalife.com twitter.com/Cobratate/stat…Bro... the year was almost over. He didn't need to take this L... 😂😂🤣 twitter.com/GretaThunberg/…#1. Cain Velasquez looks back on WWE match with Brock LesnarWWE Announces Matches With Tyson Fury And Cain Velasquez At Crown Jewel EventCain Velasquez recently looked back on his WWE match with Brock Lesnar in 2019. He labeled the time he spent with 'The Beast Incarnate' as 'interesting and uncomfortable'.Their rivalry dates back to their time in the UFC. The pair headlined UFC 121, where Velasquez was crowned the new heavyweight champion after knocking Lesnar out in the first round. Years later, WWE attempted to exploit their old feud by booking an MMA-centered mega match at Crown Jewel.In an appearance on the Keepin' It 100 Podcast, Velasquez revealed that it was professionally uncomfortable to work in tandem with Lesnar:"Yeah, professional and I would say it was a little uncomfortable [planning out the match with Brock Lesnar]... Working with Brock was interesting man, that’s all I’m gonna say... It was very different."Velasquez was recently released from prison on $1 million bail and has since competed inside the wrestling ring.