It was a mismatch. Mikey Garcia (35-0, 29 KO) appeared to be in an entirely different weight class from Elio Rojas (24-3, 14 KO).
Garcia took nearly an entire minute before a threw a single punch, the movement and speed of Rojas clearly preventing him from getting set. Garcia, although keeping his left hand high to parry, was squaring his shoulders to suggest that he was looking to land a left hook. Rojas primarily worked the body with jabs and straight right hands. This was Rojas' round on activity.
Rojas continued to outwork Garcia, the right hook to the body being his signature. At 1:10 left, Garcia landed a right hand to the head which Rojas returned nearly ten seconds later. Another round for Rojas.
By this time, it was obvious that Rojas did not have enough power to hurt Garcia. Rojas was knocked down for the first time at 1:34 from what appeared to be an overhand right to his temple, that initiated the fall, followed by a left hook as he was going down. It was the beginning of the end, for it was evident that Garcia's power was leaving its imprint. Another overhand right sent Rojas down again at 0:35.
Garcia stalked Rojas throughout and won this round on activity, the first round that Garcia truly dominated.
Rojas downed from a right hand yet again at 1:40 remaining. Then, with just over a minute remaining in the round, it appeared that Garcia stunned him with a right uppercut that left his chin in the air. This was followed by a left hook that knocked him down on his back. Rojas pounded the mat with his gloves in frustration and immediately got to his feet. The referee gave him the standing eight count but called it off as Rojas' facial expression and body language suggested that he was worn out and had nothing left. The fight was officially waved off at the 0:58 mark.
Garcia has been unequivocal on his plans to trim down to the lightweight division to become a unified champion before coming back up in weight to 140 pounds again. It must be noted that Rojas was not a legitimate junior-welterweight, so one cannot conclude that Garcia has vicious power at 140 pounds. Garcia's lack of head movement allowed Rojas to time him with straight right hands.