Harold is best known for playing Teri Hatcher's character's boyfriend on "Desperate Housewives," as well as Brian on "Queer as Folk."
"He has fractured his shoulder and is under observation to assess any possible further injuries," his representative told Usmagazine.com. "Everyone is hopeful for a full recovery. No one else was injured in the accident."
The 38-year-old actor is recovering from Tuesday's accident in Los Angeles, the report said.