The fight lasted all 5 rounds.
The judges unanimously gave the victory to Ortega - 50:45, 50:45, 50:45.
For an American, this is the 15th victory in MMA with one defeat.
Jung Chan Sung has 16 wins and 6 losses.
Earlier it was reported that the Russians Said Nurmagomedov and Grishin won victories at UFC Fight Island 6.