Joe Colborn, better known as Joe "JoBo" Bohannon on Chicago radio, died this week.

B96, where Colborn spent many years on the air, announced his passing on Monday. He was 70.

Colborn grew up in Ottawa, Illinois. Published reports noted that Colborn was on the air at several other stations, including the former WGCL in Cleveland, Ohio, before joining Chicago's B96, WBBM-FM, in 1984.

Colborn initially did an evening show. But in 1988, he was teamed together with Eddie Volkman — the son of CBS Chicago Channel 2 meteorologist Harry Volkman — for the morning drive. The younger Volkman had joined B96 a couple of years earlier and had already been on the air in the morning with other hosts.

On Facebook, Volkman wrote that even before he and Colborn were teamed together on the air, he was "immediately amazed at [Colborn's] incredible energy, style, and people skills."

Volkman wrote that he and Colborn had to adapt to each other. He wrote that he himself had often done bits in which he would have a dialogue with a "character" whose lines he had pre-recorded with his own voice, but this was not Colborn's style.

"Unfortunately, Jobo did not do well with 'scripts,' so we adapted to basic 'concepts' of the skit, and because of that, we developed what I consider some of the best ad-lib, improv skills ever. Jobo understood gut human desires, interests and impulses," Volkman wrote. "He never wasted a break — when he opened the mic, magic always exploded through the airwaves."

On the air, Colborn was known for the catchphrase, "Are we in Chicago, or what?"

In 1994, Eddie and JoBo were fired from B96 for gross misconduct after Colborn spread a false rumor on the air that a local TV anchorwoman was carrying the child of a Chicago Bulls basketball player. The claim also resulted in a libel lawsuit.

Eddie and JoBo went on to work briefly at Q102 in Philadelphia before returning to B96 in 1996. They remained immensely popular on the air at the station until 2008, when they were let go from B96.

Eddie and JoBo went on to host a talk show together on WLS-AM beginning in 2010, and appeared on the former K-HITS 104.3 FM in 2011 and 2012.

Colborn later retired from radio and moved back to Freeport, Illinois, where his family lived, though Eddie and JoBo did make an appearance together again on B96 in 2024.

B96 called Colborn a legend, who helped make the station what it is today.

"For years, he and Eddie brought laughter, energy, and real Chicago spirit to our airwaves," B96 posted on social media.

The cause of his death has not been revealed.