Question: What sports league did a star of Learning the Ropes play in?
Context: Electronic Sports League One Katowice 2015, known as ESL One Katowice 2015 for short, was the fifth "" ("CS:GO") Major tournament that was from March 12–15, 2015 at the Spodek Arena in Katowice, Silesian Voivodeship, Poland.  It was the first "CS:GO" Major of 2015.  It was organized by Electronic Sports League with sponsorship from Valve Corporation.  The tournament had a total prize pool of $250,000 USD. Electronic Sports League Major Series One Katowice 2014, known as EMS One Katowice 2014 for short, was the second "" major that was held from March 13–16, 2014 at the Spodek Arena in Katowice, Silesian Voivodeship, Poland.  It was organized by Electronic Sports League and sponsored by the game's developers Valve Corporation.  The tournament had a total prize pool of US$250,000.  Virtus.pro was the winner of the event after beating Ninjas in Pyjamas in the finals. There are professional teams based in Canada in several professional sports leagues.  The National Hockey League has seven Canadian franchises and is the most popular professional sports league in Canada.  The second most popular sports league in Canada is the Canadian Football League.  Major League Baseball, the National Basketball Association and Major League Soccer are also popular in Canada, more so in Ontario than the rest of the country. Walter Tin Kit ("Sneeze") Achiu (Simplified Chinese: 徐天杰) (born August 3, 1902 in Honolulu, Hawaii and died March 21, 1989) was an American football player.  He was a graduate of The Kamehameha Schools and Saint Louis College (now Saint Louis School) in Honolulu, Hawaii.  Achiu is most well known for being the first person of east Asian descent to play in the National Football League.  He was one of the first people of a minority to play in any major American professional sports league, preceding Jackie Robinson's entry to Major League Baseball by twenty years.  He was elected into the University of Dayton Athletic Hall of Fame in 1974. Mock draft is a term used by sports websites and magazines in reference to a simulation of a sports league draft or fantasy sports league's draft. Learning the Ropes is a Canadian-produced sitcom that aired on CTV in Canada and in syndication in the United States from September 1988 to March 1989.  The series stars Lyle Alzado as Robert Randall, a teacher who works as a professional wrestler in the evening.  Although his children knew about Randall's double life, the family was forced to keep it secret at school.  The series featured guest appearances by many wrestlers of the National Wrestling Alliance (NWA). Electronic Sports League One Cologne 2014, known as ESL One Cologne 2014 for short, was the third "" ("CS:GO") Major that was held during Gamescom 2014 from August 14–17, 2014 at the Cologne Exhibition Centre in Cologne, North Rhine-Westphalia, Germany.  It was the second "CS:GO" Major of 2014.  It was organized by Electronic Sports League with sponsorship from Valve Corporation.  The tournament had a total prize pool of $250,000 USD. The Mid-Atlantic Prep League, also known as the MAPL, is a sports league with participating institutions from prep schools in New Jersey and Pennsylvania in the United States.  The league comprises schools known for their academic rigor, but the quality of play in all sports is fairly high.  MAPL schools are allowed to have a limited number of post-graduates (student-athletes who have already graduated from high school and are taking an intermediate step between high school and college) on their rosters. Lyle Martin Alzado (April 3, 1949 – May 14, 1992) was a professional American football defensive end of the National Football League famous for his intense and intimidating style of play. The 2004–05 NHL lockout was a lockout that resulted in the cancellation of what would have been the 88th season of play of the National Hockey League (NHL).  It was the first time the Stanley Cup was not awarded since 1919, and the first time a major professional sports league in North America canceled a complete season because of a labor dispute and the second time after the 1994–1995 MLB strike that the Playoffs of a major professional sports league in North America were cancelled.  The lockout lasted 10 months and 6 days starting September 16, 2004, the day after the collective bargaining agreement (CBA) between the NHL and the NHL Players Association (NHLPA) that resolved the 1994–95 lockout expired.  The lockout of the 2004–2005 season resulted in 1,230 unplayed games.  The negotiating teams reached an agreement on July 13, 2005, and the lockout officially ended 9 days later on July 22, after both the NHL owners and players ratified the CBA.
Answer: the National Football League