Christensen capitalized on his Round 1 score by four strokes, while Breidenbach improved by 3 strokes in the competition held at Pinehurst Resort in North Carolina
The Mustangs were led by Nate Peyerl and Andrew Wilhelm, who each finished in the top third of the field of 300-plus competitors from across the country.
Sheyenne's Andrew Wilhelm will tee off in the World Stars of Golf Junior Championship in Las Vegas Tuesday morning, while Davies' Abby Voeller and Nora Benson began play at the NHSGA High School Golf National Invitational in North Carolina
Jenkins was knocked out of his first two events at the 8AAA track meet by .06 seconds combined, but qualified in the 4x400 meter relay as the anchor leg.
Sheyenne's Peyerl edged Fargo North's Landon Olson and Fargo Davies' Gabe Benson for the individual title and led the Mustangs to a second consecutive team championship on Wednesday.
Fargo Shanley's Jake Skarperud and Fargo Oak Grove's Cody Card among finalists for the 1st North Dakota Mr. Golf and Wahpeton's Anaka Lysne a finalist for Ms. Golf.