Brandon Rios pounded rival Mike Alvarado en route to a third-round knockout in the rubber match of their series Saturday in Broomfield, Colorado.

Rios pummeled Alvarado in every conceivable way from the opening bell and Alvarado, perhaps shot, offered almost nothing in return. Referee Jay Nady stopped the fight after Round 3 on the ring doctor’s advice but it also seemed Alvarado didn’t want to go on, citing vision problems.

The CompuBox stats are staggering. Rios (33-2-1, 24 knockouts) landed 120 of 290 punches. Alvarado (34-4, 23 KOs) landed only 20 of 87.

Rios landed the biggest of many hard shots in the final round, a vicious upper cut that forced a badly beaten Alvarado to take a knee. The fight ended with Alvarado on his stool moments later.

Rios stopped Alvarado in the seventh round in their first fight, in October 2012. Alvarado won the rematch by outboxing Rios to win a decision the following March.

Rios was coming off a disqualification victory over Diego Chaves in August, which followed consecutive losses to Alvarado and Manny Pacquiao.

Alvarado has now lost three consecutive fights, to Ruslan Provodnikov, Juan Manuel Marquez and Rios.