From the Mercury News:
Bay City News Service
Authorities are determining if a bicyclist who died after he was found Sunday on a San Mateo County road was hit by a vehicle or crashed on his own.
Clay Mankin, 49, of Berkeley, was apparently unconscious when he was found on the road near 10501 Skyline Boulevard in San Mateo County around 3:37 p.m., according to the California Highway Patrol. He was pronounced dead around 4:16 p.m.
The CHP's Redwood City area office is investigating the crash.
An autopsy could be performed as early as Monday, according to the San Mateo County Coroner's Office.
This is just so sad. Clay is the guy who did the custom fitting for Chris' Calfee road bike. If it turns out he was hit buy a car, I hope the person responsible is punished to the fullest extent of the law. My condolonces go out to Clay's family and close friends.
More info from mtbr: http://forums.mtbr.com/showthread.php?t=144399
Update: It appears Clay may have had a heart attack while riding his bike on a trip down to Santa Barbara.
http://www.insidebayarea.com/argus/localnews/ci_3217283