Troopers from the Marysville Post of the State Highway Patrol responded to a motorcycle accident Friday afternoon at 2:55 on State Route 37 near Richwood.
James Patterson, 64, Richwood, was traveling south on SR 37 when he failed to negotiate a left curve near the CR 200 intersection.
The 2005 Honda VTX 800 motorcycle went off the right side of the roadway, where it overturned and struck a tree.
Patterson was taken by the North Union County Fire Department to the Union County Memorial Hospital, where MedFlight then transported him to OSU Medical Center in Columbus where he died Saturday at 1:08 pm.
It's the second fatal accident in Union County this year.
The crash remains under investigation.