Keeshawn Barthelemy scored 20 points, Jackson Shelstad added 19 and Oregon closed the game on a 22-8 run to rout Southern California, 82-61, on Saturday afternoon in Eugene, Ore.The Ducks (21-8, 10-8 Big Ten) held the Trojans without a field goal for nearly six minutes in the decisive late-game stretch. Meanwhile, Oregon’s long-range shooting ignited with a pair from Barthelemy beyond the arc, plus 3-pointers from Shelstad and Nate Bittle.Four of the Ducks’ 10 triples on 27 attempts (37 percent) for the afternoon came over that 2:24 span, and Oregon hit 9 of 20 from deep in the second half overall.Barthelemy’s 4-of-6 3-point shooting for the game led the Ducks, while Shelstad connected on 3 of 6 from deep. Shelstad added four assists, matching TJ Bamba and USC’s Saint Thomas for a game-high.Shelstad also swiped a pair of steals to complement Bamba’s three, while Bittle had five blocked shots to help Oregon’s defense set the tone.The Ducks held the Trojans (14-15, 6-12) to 21-of-61 shooting from the floor, including 5 of 22 from beyond the arc. Rashaun Agee accounted for almost half of USC’s total made field goals, going 10-for-14 in the loss.