The two have been teammates since the 2013-14 season and attribute their on-field chemistry, at least in part, to a game they play in their apartment.
"We play Nerf basketball at home," Kopach said. "We usually have a countdown from three and see who can make the basket, so that might help."
Southern Illinois leads the MVC with an average of 1.10 double plays turned per game. The Salukis are in a six-way tie for 14th in the nation in that category.
"I give all of my success to the defense," senior right-handed starter Bryce Sablotny said.