COLUMBIA, Mo. — Jordan Barnett scored 17 points and K.J. Walton added 16 as Missouri defeated Arkansas 83-78 Saturday, snapping a 14-game Southeastern Conference losing streak. Kevin Puryear had 15 points and eight rebounds, and Cullen Van Leer scored 12. Missouri (6-16, 1-9 SEC) hosted its second-annual “Rally for Rhyan” to raise money and bring