|City of license||WDUZ: Green Bay, Wisconsin
WDUZ-FM: Brillion, Wisconsin
|Broadcast area||Green Bay, Wisconsin|
|Branding||"Sports Radio 107.5 and 1400 The Fan"|
|Frequency||WDUZ: 1400 kHz
WDUZ-FM: 107.5 MHz
|First air date||WDUZ: 1947
WDUZ-FM: 1993 (as WEZR)
|Power||WDUZ: 1,000 watts|
|ERP||WDUZ-FM: 3,600 watts|
|HAAT||WDUZ-FM: 268 meters|
|Facility ID||WDUZ: 25119
|Callsign meaning||The station took its call sign and original slogan ("D-U-Z does it all") from DUZ laundry soap, a popular product at the time of the station's founding|
|Affiliations||CBS Sports Radio|
|Owner||Clear Channel Communications
(operated by Cumulus Media; reacquisition pending)
(Citicasters Licenses, Inc.)
|Sister stations||WKRU, WOGB, WPCK, WQLH|
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WDUZ (1400 AM) and WDUZ-FM (107.5 FM) are radio stations serving the Green Bay, Wisconsin area, simulcasting a Sports Talk format as "Sports Radio 107.5 and 1400 The Fan." The stations are owned by Clear Channel Communications, though they are still operated by their previous owner, Cumulus Media, who swapped ownership of both stations (and 3 other Green Bay signals) to Clear Channel in exchange for 2 Ohio stations in early 2009. In August 2013, Clear Channel reached a deal to sell its Green Bay stations back to Cumulus.
WDUZ went on the air in 1947 under the ownership of Green Bay Broadcasting Company, formed by veteran Wisconsin broadcaster Ben A. Laird. The station's format until the 1990s consisted of an eclectic mix of music; during the late 1950s and much of the 1960s, early morning music consisted of a mix of polka and country music, easy listening and middle-of-the-road music during the daytime, and rock and roll music from 7PM to midnight. News content on WDUZ included Paul Harvey's ABC Radio commentaries; Harvey had credited Ben Laird for suggesting to ABC Radio that Harvey's show should air nationwide on the network. By the mid-1990s, WDUZ would morph into a mixed bag of adult contemporary music, news, sports, and talk radio, eventually going to full-time sports talk in the latter half of the 1990s (as "Sports Radio 14 The Fan"). Cumulus Broadcasting purchased WDUZ and its sister station WQLH in the fall of 1999.
In the fall of 2003, Cumulus moved the WDUZ call letters and sports format to its station at 107.5 FM (the former WXWX) and turned 1400 AM into a talk radio station ("Super Talk 1400 WNGB"), a format that featured nationally syndicated talk programming such as shows from G. Gordon Liddy and Bill O'Reilly. WNGB's ratings performance proved dismal, and in September 2004, Cumulus returned the WDUZ calls and sports talk format to 1400 AM, in a full simulcast with 107.5 (which remained WDUZ-FM).
Programming on the 107.5 FM frequency dates back to as far as 1993, when it was a beautiful music/easy listening station under the WEZR call letters. Around the mid-1990s, the format changed to smooth jazz while still under the WEZR call sign. Cumulus Broadcasting purchased the station in March 1998 and immediately dropped the jazz format. After a weekend of stunting with Orson Welles' "The War of the Worlds" (mixed in with Elton John's "Rocket Man"), WEZR became "The Planet 107-5," a mix of adult contemporary and eclectic rock.
"The Planet" format lasted only one year. On April 1, 1999, Cumulus flipped WEZR (and its country music sister station in Appleton, 96.9 FM WUSW) to a modern rock simulcast as "97 and 107 The Fox." With that format flip, 107.5 would take the call letters WXWX (while WUSW changed to WWWX).
The "Fox" simulcast lasted until October 2003, when Cumulus moved the WDUZ call letters and sports talk programming (see above) to 107.5. (WWWX would continue as a stand-alone rock station serving the Fox Cities area.) Sports talk continues to this day on 107.5, even with the simulcast with WDUZ-AM.
"The Fan" programming
The WDUZ schedule emphasizes local sports talk programming, including "The Fan Nation Morning Show," "FanLine" in late mornings, and "Sportsline" with Harry Sydney, Chris Havel, and Chris Terlop in late afternoons. "The Fan" also featured some national talk and live event programming from ESPN Radio until dropping the network on January 2, 2013 and affiliating with CBS Sports Radio, which is distributed by Cumulus Media and whose schedule includes The Jim Rome Show, a longtime part of WDUZ's schedule (Rome was distributed by Premiere Networks before joining CBS Sports Radio). 
"The Fan" served as radio home of UW-Green Bay Phoenix men's and women's' basketball until the 2013-2014 season. They are the Green Bay radio home for Wisconsin Badgers athletics and Marquette Basketball. The Fan also carries NFL games through Westwood One. From 2000 to 2004, both frequencies served as Green Bay's flagship stations for Green Bay Packers football. During that time, Milwaukee Brewers baseball and Milwaukee Bucks basketball also aired on "The Fan." The Packers, Brewers, and Bucks would all move over to Midwest Communications' sports-talker WNFL in 2005; the Packers and Brewers now air on its sister station, WTAQ.
- List of callsign meanings from WisconsinBroadcasting.com
- Ownership swap is in the works for 5 area radio stations - Green Bay Press-Gazette (released January 3, 2009)
- "Ownership Of Green Bay Cluster Goes Back From Clear Channel To Cumulus". All Access. August 30, 2013. Retrieved August 30, 2013.
- "Warren Gerds column: Area radio stations shuffle lineups", from Green Bay Press-Gazette, March 9, 2009
- "WGBW-AM picks up ESPN sports programming," from Green Bay Press-Gazette, 1/1/2013
- "Format Changes". Your Midwest Media. 2 January 2013. Retrieved 24 February 2013.
- "The Fan" website
- Query the FCC's AM station database for WDUZ
- Radio-Locator Information on WDUZ
- Query Nielsen Audio's AM station database for WDUZ
- Query the FCC's FM station database for WDUZ
- Radio-Locator information on WDUZ
- Query Nielsen Audio's FM station database for WDUZ