The Blue Jays acquired Southisene and outfielder Brett Bateman from the Cubs on Sunday in exchange for right-hander Kevin Gausman, Mark Feinsand of MLB.com reports.
Regarded as the superior of the two prospects heading back to the Blue Jays, Southisene has enjoyed a strong season at High-A South Bend, slashing .326/.451/.372 with 20 steals in 44 games since he was promoted from Single-A Myrtle Beach on May 2. Though the 21-year-old middle infielder is touted for his speed and plate discipline, his profile is completely lacking in power; he's yet to hit a home run in 157 career minor-league games.