With his appearance, Rosas became — by far — the youngest fighter to compete on the Contender Series — younger than Chase Hooper (18), Maycee Barber (20), and Sean O'Malley (22).
Amongst the teenager's box of tricks was this spinning back kick:
And this takedown in which he bamboozled Gutierrez by feinting a flying knee:
In this video from Insider, Rosas can be seen leaving the Octagon, victorious, before exchanging words with UFC boss Dana White: