The LumberKings offense produced two big innings Thursday -- scoring three runs in the fourth and six more in the sixth -- and O'Neill played a big part in both. He led off the fourth with a double and came around to score Clinton's first run of the night. In the sixth, he hit a two-out grand slam off reliever Victor Diaz, breaking the game wide open.
O'Neill's recently returned from the disabled list after missing nearly three months due to a broken right hand. He suffered the injury May 10 when he punched a dugout wall in frustration.
O'Neill, the Mariners' third-round pick in the 2013 First-Year Player Draft, had been off to a good start to before his injury. At the time, his six home runs were tied for first in the Midwest League.
Now healthy again, O'Neill has picked up where he left off. In 40 games with the LumberKings, he is hitting .269/.343/.532 with 11 home runs.
Teddy Cahill is a reporter for MLB.com. Follow him on Twitter at @tedcahill. This story was not subject to the approval of Major League Baseball or its clubs.