The brilliant Ballybofey boxer took on Fernando Najera before a huge crowd and American TV audience.
Jason was awarded the fight after three rounds.
Having started confidently and on the front, Quigley left Najara bloodied after a flurry of punches in the third and before the fourth, the Mexican’s corner signalled he could not continue.
The referee award the fight to Jason on a Technical Knock-Out!
Said Jason this morning: “I’m absolutely buzzing.
“The support that I’m getting is just unbelievable.
“Thank you everybody for all messages and support. It means so much. And a Big Thank you to my family and my team.”