Caleb Grill and Mark Mitchell scored 17 points each as Missouri defeated Arkansas 83-65 Saturday in Columbia, Mo., to remain unbeaten at home.Tamar Bates scored 15 points, Tony Perkins scored 11 and Trent Pierce added 10 as the Tigers (15-3, 4-1 Southeastern Conference) improved to 14-0 at Mizzou Arena.Zvonimir Ivisic had 14 points, 10 rebounds and two blocked shots as the Razorbacks (11-7, 0-5) remained winless in league play. Adou Thiero scored 12 points and grabbed six rebounds for Arkansas.The Razorbacks outscored Missouri 42-32 in the paint and blocked six shots, but the Tigers built a 14-4 edge in free throws and an 11-5 advantage in 3-point makes.Missouri raced to an 18-2 start with Bates hitting three 3-point jumpers and scoring on a transition layup.Arkansas finally answered with a 9-2 run, capped by Ivisic’s 3-point jumper from atop the key, to cut the lead to 20-11.The Tigers continued their hot shooting through the half, pushing their lead to 35-18 with Perkins and Gtill knocking down 3-pointers.Missouri extended its lead to 52-35 at the half by closing with a 6-2 surge, capped by Mitchell’s drive with 11 seconds left.