A relative picked the man up at the levee and brought him into Watsonville, Monterey County sheriff's Sgt. Joe Moses said. The stabbing occurred around 3:30 p.m., he said.
Medical personnel responded to the 600 block of Main Street in Watsonville to attend to the victim. The man, believed to be in his early 20s, was transported by helicopter to a hospital in Santa Clara County, Moses said.
Moses did not know the extend of the man's injuries and did not have information about a possible suspect or motive.