Pro boxer Mylik Birdsong -- a 15-1-1 pugilist who was slated to step in the ring as part of a UFC Fight Pass card in just a few weeks -- was killed on Sunday ... during a shooting in Los Angeles.
The LAPD says the incident took place at around 4:50 PM near Watts -- just a few miles south of downtown -- when several men inside of a dark-colored SUV drove up on the fighter and opened fire.

Police On The Scene ONSCENE.