A Liberal truck driver was injured after a roll-over early Monday morning west of Liberal.  The Kansas Highway Patrol reports 60 year old Robert Cantu-Perez was driving west on Seward County Road 3 when attempting make a right turn onto Seward County Road C the semi rolled over into the grass. This happened 4.9 miles west of Liberal just before 6 a.m. Monday morning.  Cantu-Perez was taken to Southwest Medical Center with a possible injury.