Neither. Andrew Siciliano used to work at WMAQ 670 AM as a sports anchor in the '90s before relocating to Los Angeles in 2000. WMAQ was the precursor to WSCR at 670 AM.
He's best known for his work as a host on NFL Network and as host of RedZone from 2005-23 before he was laid off by NFL Media in budget cuts this past April. He's also been the preseason TV voice of the St. Louis & Los Angeles Rams for a decade.
Siciliano filled in for Jim Donovan for 3 Cleveland Browns' games radio last fall due to radiation therapy related to leukemia. Donovan had been the radio voice of the Browns for 25 years, but a recurrence of leukemia forced Donovan to retire completely just a few days ago.