Center Malique Ewin scored a season-high 21 points and collected first three assists of the campaign, Karter Knox had a double-double, and No. 21 Arkansas placed seven players in double figures in a 115-61 blowout of Jackson State on Friday in Fayetteville, Ark.Knox had 17 points and 10 rebounds, D. J. Wagner had 16 points, and Meleek Thomas added 13 off the bench for the Razorbacks (5-1), who scored their most points in a game in coach John Calipari’s two seasons.Tamarion Hoover had 19 points and hit four 3-pointers while Dorian McMillian had nine points for the Tigers (0-5), who have also lost to No. 8 Illinois, No. 6 Louisville and No. 22 Auburn. Second-leading scorer Daeshun Ruffin did not score in eight minutes.The Razorbacks led 47-19 at the half and kept pushing, making 16 of their first 19 field goal attempts in the second half. They scored 68 points in the frame and led 79-27 with 12 minutes remaining.Arkansas shot 63.9% from the field and had a 38-27 rebounding advantage while committing only six turnovers.Billy Richmond III had a season-high 14 points and Darius Acuff Jr. had 10 for the Razorbacks, who also made 28 of 36 free throws.The Tigers shot 34.4% from the field and made 9 of 27 3-pointers. They were 7 of 33 from the floor in the first half, including 3 of 15 from distance.Arkansas has won all 13 meetings between the two teams.