In 2010, Barnyashev signed a contract with WWE and was assigned to its developmental territory Florida Championship Wrestling (FCW), which was rebranded as NXT in 2012.

He originally lived in Virginia,[5] before relocating to Torrance, California, where he began training as a wrestler under Gangrel and Rikishi at the Knokx Pro Wrestling Academy.

[1][3][5] Barnyashev debuted in the San Diego, California-based independent promotion New Wave Pro Wrestling on November 22, 2008, under the ring name "Miroslav Makaraov", defeating Aerial Star.

[7] In 2010, Barnyashev joined the Santa Maria, California-based independent promotion Vendetta Pro Wrestling (VPW), shortening his ring name to "Miroslav".

[19] Rusev proceeded to adopt Lana as his "social ambassador",[20] a pairing compared by WWE to Ivan and Ludmilla Drago from the 1985 film Rocky IV.

[33] In May, Rusev adopted a Russophillic, anti-American gimmick that saw him announced as having relocated to Russia,[34][35][36] and as having been named "Hero of the Russian Federation".

[45] Lana dedicated Rusev's string of victories to President of Russia Vladimir Putin, drawing attention from the mainstream press – including The Washington Post and The Daily Beast – and criticism after she was interpreted as having referred to the crash of Malaysia Airlines Flight 17 before Rusev's match at Battleground in an attempt to generate heat.

[51][52] Rusev lost the United States Championship to Cena in a rematch at WrestleMania 31 after a miscommunication with Lana, ending his reign at 146 days and marking his first pinfall loss on WWE's main roster.

[56] The three pay-per-view losses in a row irreversibly damaged the air of power Rusev had built up, leading to TheSportster labeling it as a burial.

[62][63] Rusev made his in-ring return on the following SmackDown, wrestling in shoes to avoid further foot injury, defeating Fandango.

[65] On the July 16 episode of SmackDown, Rusev suffered his second loss by pinfall during his tenure on the WWE main roster when he was defeated by Cesaro in a singles match.

[75] A week later, on November 30 episode of Raw, Lana returned to the WWE, once again as a villainess, and reconciled with Rusev, during a Miz TV segment, and later in the same night, the two joined Sheamus' new stable The League of Nations.

[77][78] Also in November, Rusev joined forces with Sheamus, King Barrett and Alberto Del Rio forming The League of Nations.

[79] On the March 14 episode of Raw, Rusev and Del Rio failed to win the WWE Tag Team Championship from The New Day.

[100] "Rusev has been quite the company man as of late, doing favors for many returning veterans while not being showcased the way he should be given his size, ring work, and ability on the mic.

On the November 21 episode of Raw, after being locked out of his locker room, Enzo Amore would run into Lana in the hallway before being angrily confronted by Rusev.

[106] He was not granted his request, but on the July 4 episode of SmackDown, he made his first appearance for the brand and confronted the returning John Cena, setting up a flag match for Battleground,[107] which he lost.

[121] Rusev entered the 2018 Royal Rumble match on January 28 as the first entrant, lasting over 30 minutes before being eliminated by Bray Wyatt and Matt Hardy.

[122] On the March 27 episode of SmackDown, Rusev teamed with Jinder Mahal to defeat Bobby Roode and Randy Orton, adding him to the United States Championship match at WrestleMania 34.

[127] On the following episode of SmackDown, he won a gauntlet match to become the number one contender for AJ Styles' WWE Championship at Extreme Rules.

[129] In July, Rusev Day started a feud with Andrade "Cien" Almas and Zelina Vega, thus turning them face in the process for the first time in his career.

Rusev and Lana lost a mixed tag team match to Almas and Vega at SummerSlam but defeated them in a rematch on the August 21 episode of SmackDown.

[153] Barnyashev, now known as Miro, debuted in All Elite Wrestling (AEW) on the September 9, 2020, episode of Dynamite, where he was revealed as Kip Sabian's best man for his upcoming wedding with Penelope Ford.

[2] On the September 23 episode of Dynamite, Miro made his in-ring debut, teaming with Sabian to defeat Joey Janela and Sonny Kiss.

[156] At the Beach Break event on February 3, 2021, Miro officiated Sabian and Ford's wedding, but the ceremony was crashed by Taylor and Cassidy.

[163] He then made successful defenses against the likes of Evil Uno,[164] Brian Pillman Jr.,[165] Lee Johnson,[166] Fuego Del Sol,[167] and Eddie Kingston at All Out.

[176] After a six-month hiatus due to injury and outside the ring projects, Miro made his return to AEW television on the June 1, 2022, edition of Dynamite, scoring a submission victory over Johnny Elite.

[179] Following another lengthy absence, Miro made a return on the May 10, 2023 episode of Dynamite, where he walked into AEW CEO Tony Khan's office.

[180] Miro made his in-ring return on the premiere episode of Collision on June 17, defeating Tony Nese in a squash match.

[182] On December 30 at Worlds End, Miro defeated Andrade El Idolo with the assistance of CJ in what would be his final AEW match.