The Kansas City royals drafted Cabral in the Rule V Draft and sold his rights to the New York Yankees for $100,000. The Tampa Bay Rays drafted him in last year's Rule V Draft but could not keep him on the active roster and had to offer him back to the Red Sox. That the Rays picked him is almost an endorsement in itself. They are that good at scouting and evaluating pitchers.
Here is the SoxProspects.com Scouting Report:
Lefty with a solid frame and a smooth delivery. Pitches exclusively from the stretch. Fastball sits between 88-92 mph and tops out at 95 mph. Secondary pitches include an excellent 81-83 mph circle changeup, a mid-70s slurvey curveball, and a sharp 79-82 mph slider. Gets a lot of swings and misses with his changeup, which has nice downward movement. Excellent command and control, attacks hitters. Cabral was selected in the Major League phase of the 2010 Rule 5 Draft by the Tampa Bay Devil Rays, but was returned to the Red Sox at the end of spring training.He has strong strikeout rate, strong groundball rates, and control that isn't ideal but far from disastrous. He has now played well through double-A and seems ready for a real shot at a major league job. I expect he will do well.