The injury crash happened just before 2 a.m. in the 3900 block of Ingraham Street when the rider, headed south, suddenly swerved to his left and hit a dumpster, San Diego police officer John Buttle said.
He was taken to a hospital with serious injuries that were not expected to be life-threatening, and investigators did not believe alcohol was a contributing factor in the accident.
The crash happened just blocks away from where a motorcyclist was killed about 9:20 p.m. Sunday, police said. The victim of that crash, a 65-year-old man, collided with a minivan that turned in front of him in the 3700 block of Ingraham Street. The victim was taken to a hospital where he died from his injuries.
The San Diego Police Department's traffic division was investigating both crashes.