The 19-year-old has a career 3.21 ERA in three seasons in the Minors since being signed as an amateur free agent out of Venezuela in 2011. The 5-foot-10 lefty possesses a low-90s fastball as well as a curveball, slider and changeup.
"He's had a pretty good year so far," Twins general manager Terry Ryan said. "We had a list of a couple guys and wanted to take him. He's holding his own in the Midwest League, which is a good sign."
Sulbaran, who is one of the youngest pitchers in the Midwest League, is scheduled to report to Class A Cedar Rapids, where the Twins already have seven top-ranked prospects.
Rhett Bollinger is a reporter for MLB.com. Read his blog, Bollinger Beat, and follow him on Twitter @RhettBollinger. This story was not subject to the approval of Major League Baseball or its clubs.