Spence Jr, who boxed to the united states at the London 2012 Olympics, went the distance in his hometown – his first 12-round bout in his past 1 2 struggles.
Judges scored the bout 120-107 120-108 120-108 in the 29-year-old’s favour.
“Folks said I couldn’t ship. You saw it today,” he explained.
“I can box, I can move my mind. I certainly can do it if I’d like to,” Spence added, after landing 375 cries to Garcia’s 75.
Previously undefeated Garcia, 31, suffered his first loss in 40 professional fights.
“He’s your reality. He could be for real. He arrived with a video game program, kept his distance. I couldn’t make adjustments,” Garcia said, after falling to 39-1 with 30 KOs.
Filipino Pacquiao challenged Spence Jr into some fight after his victory which saw him grow to 25-0.
“I am considering the winner of the particular fight. Spence wants to fight with me ,” Pacquiao. “I hope to return here, soon.”