Jack Diamond

Without fanfare Jack Diamond returned as morning host on WLS FM 94.7 Monday after nearly fours month off on medical leave.

Diamond, 60, was last heard on the Cumulus Media classic hits station in late December when he returned home to Washington, D.C., for treatment of diverticulitis. He underwent surgery January 20 and has been recuperating since.

“Jack rejoined us this morning and we welcome him back,” said Jan Jeffries, senior vice president of corporate programming for Cumulus Media and program director of WLS FM.

Through it all Brant Miller has hosted the show from 5:30 to 9 a.m. Monday through Friday, with Marti Jones as news and traffic anchor. Both are expected to remain with the show.

Cumulus Media first tried to hire Diamond after a weeklong on-air audition on WLS FM last July, but he turned down the offer to accept a job in San Diego — a gig that lasted barely two weeks before he called it quits. The company reinstated the offer and Diamond officially joined WLS FM in November.

Diamond, whose real name is Harvey Joel Fischer, was born in the Washington area and spent most of his career there, including 24 years on WRQX.

In the latest Nielsen Audio survey, WLS FM tied for 12th in mornings with a 2.8 percent share and cumulative weekly audience of 399,300.