Dale Reed Bacon, 41, allegedly attacked the older man in the 1900 block of Fifth Avenue around 1:30 p.m. Wednesday, according to San Diego police.
Medics took the manager, whose name was not released, to a hospital for treatment of severe head injuries, SDPD Sgt. Alan Hayward said.
Bacon was arrested later in the afternoon and booked into county jail.
The case was being investigated as an elder-abuse crime, according to Hayward.
The suspect was tentatively scheduled to be arraigned in downtown San Diego on Friday afternoon, a jail clerk said.
Opening day at the Del Mar Racetrack is this Wednesday; and where the surf meets the turf, it's also the place to see and be seen.
When asked what the difference is between indoor skydiving and the real thing, most flight instructors at iFly would tell you when you fly in the tunnel, you're just missing the view.
News 8 is getting you all set for San Diego Comic-Con this week. On Monday, Marissa DiBartolo, Editor-in Chief at "The Pop Insider," stopped by Morning Extra to help.
Elevated fire restrictions went into effect Monday for the Cleveland National Forest, which encompasses more than 460,000 acres in the counties of San Diego, Riverside and Orange.
The San Diego City Council take up the controversial issue of short-term vacation rentals Monday. The council is expected to vote on Mayor Faulconer's proposal, which was introduced last month.
A federal judge has temporarily halted deportations of families who have been recently reunited after they were separated by the Trump administration.
Hiring high-skilled foreign workers leads to greater innovation and also has positive effects on business profits, according to a study conducted by UC San Diego researchers.
Venus and the moon created a spectacular sight in the western sky Sunday night, appearing inches away from each other. A crescent moon sat to the right, just two degrees from Venus by mid-twilight.
A jaguar went on a killing rampage at a Louisiana zoo on Saturday, but he was born here at the San Diego Zoo. Valerio spent two years in San Diego before being moved to the Audubon Zoo in New Orleans.