In this latest accident, the man was hit by a pickup truck at Naples and Rolph Streets in the Crocker-Amazon neighborhood.
Police tell us the pickup's driver stayed at the scene and that person is cooperating with investigators. No word yet on who was at fault.
Earlier on Tuesday a car hit a person in San Francisco and then left. A woman broke several bones after being struck at Turk and Leavenworth Streets. Police later arrested the driver on suspicion of hit and run.
Witnesses say the driver may have run a red light before driving away from the scene.