By MARK LORENZANA The third and final fight between Saúl “Canelo” Álvarez and Gennady “Triple G” Golovkin on the night of Saturday, Sept. 17, at the T-Mobile Arena in Las Vegas wasn’t as close as their first two fights, but still provided a lot of fireworks, and ended in a unanimous-decision victory for the Mexican IBF, WBA, WBC and WBO