Victor Payano is 16-year-old Dominican left-handed pitcher that signed on July 2nd with the Boston Red Sox for $900,000.
He is working out in this video at a showcase/game in Santo Domingo, against Team Canada. I happened to get video of a handful of pitches that all turned out to be balls, but Payano threw a number of good pitches. He worked from 85-87 with a heavy fastball that broke two bats, while flashing an average slider and average changeup with solid command. I've been told his velocity has reached 90 in other outings.