A Martinez motorcyclist was killed Sunday in rural Santa Cruz County after his bike veered off the road and struck a tree, the California Highway Patrol said. According to the CHP, the 30-year-old man was driving his 2023 Ducati motorcycle at an unknown speed on state Highway 9 south of state Highway 35 when for reasons still under investigation, he traveled off the roadway and crashed into an embankment and a tree. The man suffered major injuri…