#2. Robbie Lawler
Before UFC 181, if anyone had suggested that Robbie Lawler would one day become the UFC welterweight champion, such a prediction would be dismissed with laughter at best and derision at worst. At one point in his career, Lawler was an inconsistent fighter. While he was a powerful striker, he was also reckless, even reaching a stage where he had almost half as many losses as he had wins.
In search of a career resurgence, the aging Lawler made the switch to American Top Team. Not even 'Ruthless' himself could have foreseen how successful the pairing would be. Following a unanimous decision loss to Johny Hendricks for the then vacant welterweight title, Lawler became a more disciplined fighter who channeled his aggression wisely as a vicious counterpuncher.
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Amassing back-to-back wins, he again crossed paths with Hendricks, only this time Lawler defeated his rival to finally capture UFC gold. His subsequent bout was a UFC 189 matchup against Rory MacDonald. It was a war unlike any other, with Lawler emerging victorious in a fight often cited as arguably the greatest in UFC history. Lawler went on to successfully defend his title for a second time against Carlos Condit before ultimately losing his championship to Tyron Woodley.
#1. Amanda Nunes
While Amanda Nunes has erased all doubt about her previous loss to Julianna Peña at UFC 269 by thoroughly dominating her in their UFC 277 rematch, before the two women had ever crossed paths, 'The Lioness' seemed truly unbeatable. The Brazilian was on a historic 12-fight win streak that saw her defeat former champions Cris Cyborg, Holly Holm, Ronda Rousey, Miesha Tate, Germaine de Randamie and even Valentina Shevchenko.
However, before becoming a 22-5 fighter, Nunes was 9-4 after losing to Cat Zingano in a performance that punctuated her reputation as a powerful fighter with a poor gas tank and even worse pacing issues. To address her issues with strategic efficacy, Nunes found a new home with American Top Team. Under the tutelage of Mike Brown and a team of other coaches, Nunes built the foundation of her legend.
Not only did she embark on a lengthy win streak, but she captured both the women's bantamweight and featherweight championships, defending them both en route to being recognized as the greatest female fighter of all time.