1 of 21Michael Perez/AP; Jonathan Newton/The Washington Post/Getty Images; Joe Robbins/Getty Images
Kirk Cousins, Dan Snyder and Jay Gruden
Episode: "Go Fund Yourself" (Original Air Date: Sept. 24, 2014) — Washington Redskins owner Dan Snyder visits the boys' corporate headquarters to plead with them to change their name.
2 of 21
Jerry Jones and NFL owners
Episode: "Go Fund Yourself" (Original Air Date: Sept. 24, 2014) — Redskins owner Dan Snyder visits NFL headquarters to speak with Rodger Goodell and the other team owners.
3 of 21David J. Phillip/AP
Episode: "Sarcastaball" (Original Air Date: Sept. 26, 2012) — Goodell introduces the Broncos new coach Randy Marsh, who brings Sarcastaball, a ridiculously safe and emasculating new game he sarcastically created, with him. | Episode: "Go Fund Yourself" (Original Air Date: Sept. 24, 2014) -- Redskins owner Dan Snyder seeks the help of Goodell-Bot.
4 of 21Robert Beck/SI
Replacement Referees and Peyton Manning
Episode: "Sarcastaball" (Original Air Date: Sept. 26, 2012) — The replacement refs disagree on a scoring play as Randy Marsh leads Peyton Manning and the Denver Broncos to their first victory in Sarcastaball.
5 of 21Jerome Davis/Icon SMI
Episode: "Sarcastaball" (Original Air Date: Sept. 26, 2012) — Randy Marsh makes an appearance on "Rome".
6 of 21Michael J. LeBrecht II/SI; Josh Holmberg/Icon SMI; Mike McCarn/AP; Fred Vuich/SI
Jimmie Johnson, Jeff Gordon, Dale Earnhardt, Jr. and Danica Patrick
Episode: "Poor and Stupid" (Original Air Date: Oct. 6, 2010) — Cartman joins the other NASCAR drivers for a press conference.
7 of 21Jim Mone/AP
Episode: "Poor and Stupid" (Original Air Date: Oct. 6, 2010) — PTI picks up Cartman's video podcast about flavored dip and President Obama.
8 of 21Eric Gay, Handout/AP
Episode: "Sexual Healing" (Original Air Date: March 17, 2010) — The boys play the new Tiger Woods video game.
9 of 21Rich Gabrielson/Icon SMI
Episode: "Sexual Healing" (Original Air Date: March 17, 2010) — Sex addicts, including Roethlisberger and Tiger Woods, review the fundamental problem behind their addiction.
10 of 21Don Arnold/WireImage
John Cena and Edge
Episode: "W.T.F." (Original Air Date: Oct. 21, 2009) — The boys attend a professional wrestling match between John Cena and Edge.
11 of 21Peter Read Miller/SI
Episode: "Eek, A *****!" (Original Air Date: April 9, 2008) — Cartman teaches inner-city kids how to use the white person method to succeed. (Although only a photo of Belichick is seen rather than a poorly voiced impersonation, he could not be excluded).
12 of 21Michael Loccisano/FilmMagic
Episode: "Tonsil Trouble" (Original Air Date: March 12, 2008) — Magic Johnson helps the boys in their quest to find a cure for AIDS.
13 of 21Peter Read Miller/SI
Episode: "Guitar Queer-O" (Original Air Date: Nov. 7, 2007) — Stan and Kyle meet Cutler at a mansion party in Denver.
14 of 21David E. Klutho/SI
Colorado Avalanche and Detroit Red Wings
Episode: "Stanley’s Cup" (Original Air Date: Nov. 15, 2006) — Denver County doesn't show for the big game at The Pepsi Center, so Stan's Park County pee wee hockey team has to play the Red Wings instead.
15 of 21AP
Mark McGwire, Barry Bonds and Jason Giambi
Episode: "Up The Down Steroid" (Original Air Date: March 24, 2004) — The professional ballplayers appear at the Special Olympics to announce the Grand Champion, Jimmy, who cheated by using steroids.
16 of 21Richard Drew/AP
Episode: "Butters' Very Own Episode" (Original Air Date: Dec. 12, 2001) — The Stotches, attempting to cover up the disappearance of their son Butters, meet other, more famous people, with something in common.
17 of 21Manny Millan/SI
Episode: "Here Comes The Neighboorhood" (Original Air Date: Nov. 28, 2001) — The men from the bar don't take kindly to another new rich person in town, Kobe, and send him a message.
18 of 21Joe Robbins/Getty Images
Episode: "Summer Sucks" (Original Air Date: June 24, 1998) — Favre meets Mr. Garrison's puppet, Mr. Hat, in the sauna at a sports spa in Green Bay.
19 of 21Peter Read Miller/SI
Episode: "City on the Edge of Forever (Flashbacks)" (Original Air Date: June 17, 1998) — Cartman remembers the time his father was revealed a bit differently.
20 of 21George Rose/Getty Images
Brent Musburger (voiced himself)
Episode: "City on the Edge of Forever (Flashbacks)" (Original Air Date: June 17, 1998) — The boys misremember Scuzzlebutt, a misunderstood creature that had an arm made of celery, and Patrick Duffy, now Musburger, as a leg.
21 of 21Margaret Norton/NBCU Photo Bank via Getty Images
Michael Buffer (voiced himself)
Episode: "Damien" (Original Air Date: Feb. 4, 1998) — The professional ring announcer introduces the boxers in the ultimate fight between good and evil and the crowd goes wild.
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