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Aparicio was born and raised in Dundalk, Maryland. He is Venezuelan-American, and the first cousin, once removed of former Major League Baseball shortstop Luis Aparicio, as his father is a first cousin of Luis Aparicio.  He began as a sports writer at The Evening Sun edition of The Baltimore Sun where he continued as a sportswriter and music critic from 1986 until 1992. Starting in 1992 at WITH-AM 1230, Aparicio began doing daily sports talk radio both in Baltimore and later for three years at Sporting News Radio in national-syndication with 425 cities across the USA. He retired from daily radio in 2004 to concentrate on running the WNST radio station and website, which he owns and operates as Nasty 1570 Sports, LLC.
Free the Birds
2006 marked the Baltimore Orioles ninth straight losing season, causing much of the Baltimore fan base to become disgruntled with the team's ownership. A grass-roots movement called "Free the Birds" was spearheaded by Aparicio.
For several weeks, WNST aggressively promoted a protest rally that was to take place against the Detroit Tigers at Oriole Park at Camden Yards. The protest was not so much aimed towards the team itself, as it was the club's owner, Peter G. Angelos. According to the Associated Press (AP), during the fourth inning of the game, at exactly 5:08 p.m., Aparicio led a "walkout", with the protest fans leaving the game in unison. The precise time of departure, 5:08, was significant in that "5" stood for Brooks Robinson's number and "8" for the number worn by Cal Ripken, Jr. Many of the protesters wore black T-shirts that read "Free the Birds", a phrase that was chanted loudly through the walkout. Aparicio estimated that 2500 fans were involved in the protest, but the Associated Press gave a figure of 1000.
After the walkout, Aparicio was quoted in the AP by saying, "We have a chance to make a memorable civic statement about how we, as fans, are fed up with the embarrassment that the Orioles have become." Peter Angelos had a different take on the rally. "Whoever joins that protest has no comprehension of what it costs to run a baseball team," Angelos said. Referring to Aparicio, Angelos added, "he is a very unimportant person who has delusions of grandeur."
In the weeks following the protest, Aparicio created a website in honor of the rally, and declared to his listeners that he would form a union in protest of Angelos and his ownership of the franchise. Aparicio likened it to what "many in the asbestos lawsuits did a number of years ago" (a knock on the litigation that led to Angelos' success as a trial attorney). "And what could Peter Angelos possibly say to disparage the same kind of union that made him a wealthy man", said Aparicio after launching his website.
On March 30, 2011, it was reported that Jennifer Royle, a Baltimore sports reporter for WJZ-FM (105.7) filed a $800,000 defamation suit against Aparicio and two WNST hosts, Glenn Clark and Drew Forrester. Royle, who also worked for MASN, claims that Aparicio and the WNST hosts hurt her reputation with damaging statements about her professional and personal life. Aparicio's lawyer said the accusations are "baseless", and Aparicio denied wrongdoing in a blog entry. Royle later dropped the lawsuit.
- "Nestor Aparicio's Blog". WNST Radio. 2009. Retrieved 2009-02-06.
- Anft, Michael (27 March 2002). "That's Sportsertainment". Baltimore City Paper. Retrieved 1 April 2011.
- Cox, Ted (31 March 2000). "Another Aparicio Hits Chicago Sports Scene". Daily Herald (Arlington Heights, IL). Retrieved 15 November 2014.
- Freethebirds Manifesto[dead link]
- "Orioles protesters walk out on team". Sporting News (American City Business Journals, Inc.). Associated Press. September 21, 2006. Retrieved 2009-02-04.
- Chass, Murray (22 September 2006). "Fans Lament the Decline And Fall of the Orioles". New York TImes. Retrieved 22 January 2011.
- "'Free the birds': Orioles fans walk out in protest". ESPN. Associated Press. September 21, 2006. Retrieved 2009-02-06.
- Chandler, Rick. "Tensions Boil Over On Super Bowl's Radio Row!". Deadspin. Retrieved 24 July 2013.
- "Gordon Keith attacked during radio show". TXCN. Retrieved 22 January 2011.
- Rosen, Jill (30 March 2011). "Sports reporter Jennifer Royle sues hosts at rival station for defamation". The Baltimore Sun. Retrieved 1 April 2011.
- Aparicio, Nestor. "An Indictment of Local Journalism: Here’s Our Side of Baseless Royle V. WNST Lawsuit". WNST.com. Retrieved 1 April 2011.
- Zurawik, David (29 August 2011). "Jennifer Royle drops suit against Nestor Aparicio, claims victory in ending 'harassment'". The Baltimore Sun. Retrieved 30 April 2012.