Information:  - The Troy Haymakers were an American professional baseball team.  - In baseball, the pitcher is the player who throws the baseball from the pitcher's mound toward the catcher to begin each play, with the goal of retiring a batter, who attempts to either make contact with the pitched ball or draw a walk. In the numbering system used to record defensive plays, the pitcher is assigned the number 1. The pitcher is often considered the most important defensive player, and as such is situated at the right end of the defensive spectrum. There are many different types of pitchers, such as the starting pitcher, relief pitcher, middle reliever, lefty specialist, setup man, and closer.  - Robert Edward "Bob" Addy (February 1845  April 9, 1910), nicknamed "The Magnet", was an American right fielder and second baseman in Major League Baseball, whose professional career spanned from in the National Association to in the National League. He is credited as the first player to introduce the slide in an organized game, and later attempted to create a game of baseball that would have been played on ice.  - Fergus G. Malone (August, 1844  January 1, 1905) was a professional baseball player in the 1860s and 1870s. He was the catcher for Athletic of Philadelphia in 1871, champion of the first professional league season.  - The World Series is the annual championship series of Major League Baseball (MLB) in North America, contested since 1903 between the American League (AL) champion team and the National League (NL) champion team. The winner of the World Series championship is determined through a best-of-seven playoff, and the winning team is awarded the Commissioner's Trophy. As the series is played in October (and occasionally November), during the autumn season in North America, it is often referred to as the Fall Classic.  - The American League of Professional Baseball Clubs, or simply the American League (AL), is one of two leagues that make up Major League Baseball (MLB) in the United States and Canada. It developed from the Western League, a minor league based in the Great Lakes states, which eventually aspired to major league status. It is sometimes called the Junior Circuit because it claimed Major League status for the 1901 season, 25 years after the formation of the National League (the "Senior Circuit").  - Michael Henry McGeary (February 12, 1851  October 2, 1933) was an American professional baseball player whose career spanned from 1871 to 1882. He played 11 seasons in Major League Baseball, playing principally as an infielder and catcher, for seven different major league clubs: the Troy Haymakers (18701871), the Philadelphia Athletics (NA) (18721874), the Philadelphia White Stockings (1875), the St. Louis Brown Stockings (18761877), the Providence Grays (1879)(1880), the Cleveland Blues (18801881) and the Detroit Wolverines (1882). Three of those clubs, the Philadelphia White Stockings, Providence Grays and Cleveland Blues, also employed him as player-manager.  - In baseball (hardball or softball), a starting pitcher or starter is the first pitcher in the game for each team. A pitcher is credited with a game started if they throw the first pitch to the opponent's first batter of a game. A pitcher who enters the game after the first pitch of the game is a relief pitcher. Starting pitchers are expected to pitch for a significant portion of the game, although their ability to do this depends on many factors, including effectiveness, stamina, health, and strategy.  - The Chicago Cubs are an American professional baseball team based in Chicago, Illinois. The Cubs compete in Major League Baseball (MLB) as a member club of the National League (NL) Central division, where they are the defending World Series champions. The team plays its home games at Wrigley Field, located on the city's North Side. The Cubs are one of two major league teams in Chicago; the other, the Chicago White Sox, is a member of the American League (AL) Central division. The team, first known as the White Stockings, was a founding member of the NL in 1876, becoming the Chicago Cubs in 1903.  - Baseball is a bat-and-ball game played between two teams of nine players each, who take turns batting and fielding.  - In baseball and softball, a relief pitcher or reliever is a pitcher who enters the game after the starting pitcher is removed due to injury, ineffectiveness, fatigue, ejection, or for other strategic reasons, such as being substituted by a pinch hitter. Relief pitchers are further divided informally into various roles, such as closers, set-up relief pitchers, middle relief pitchers, left/right-handed specialists, and long relievers. Whereas starting pitchers usually rest several days before pitching in a game again due to the number of pitches thrown, relief pitchers are expected to be more flexible and typically pitch more games but with fewer innings pitched. A team's staff of relievers is normally referred to metonymically as a team's bullpen, which refers to the area where the relievers sit during games, and where they warm-up prior to entering the game.  - The National League of Professional Baseball Clubs, known simply as the National League (NL), is the older of two leagues constituting Major League Baseball (MLB) in the United States and Canada, and the world's oldest current professional team sports league. Founded on February 2, 1876, to replace the National Association of Professional Base Ball Players, it is sometimes called the Senior Circuit, in contrast to MLB's other league, the American League, which was founded 25 years later. Both leagues currently have 15 teams. The two league champions of 1903 arranged to compete against each other in the inaugural World Series. After the 1904 champions failed to reach a similar agreement, the two leagues formalized the World Series as an arrangement between the leagues. National League teams have won 48 of the 112 World Series contested from 1903 to 2016. The 2016 National League champions are the Chicago Cubs.  - Catcher is a position for a baseball or softball player. When a batter takes his/her turn to hit, the catcher crouches behind home plate, in front of the (home) umpire, and receives the ball from the pitcher. In addition to this primary duty, the catcher is also called upon to master many other skills in order to field the position well. The role of the catcher is similar to that of the wicket-keeper in cricket.  - Chicago (or ), officially the City of Chicago, is the third-most populous city in the United States, and the fifth-most populous city in North America. With over 2.7 million residents, it is the most populous city in the state of Illinois and the Midwestern United States, and the county seat of Cook County. The Chicago metropolitan area, often referred to as Chicagoland, has nearly 10 million people and is the third-largest in the U.S.  - George Zettlein ( born July 12 , 1844 -- May 22 , 1905 ) was a professional baseball pitcher . He played six seasons in Major League Baseball from 1871 -- 76 for the Chicago White Stockings , Troy Haymakers , Brooklyn Eckfords , Philadelphia White Stockings of the National Association ( NA ) , and Athletic of Philadelphia in the National League . Zettlein began playing in 1865 for Eckford of Brooklyn in the National Association of Base Ball Players , the amateur - only predecessor to the NA . He joined the Brooklyn Atlantics in 1866 , and remained with the team until 1870 . In 1871 , he joined the professional White Stockings of the NA , and in May 1871 he gave up the new league 's first home run . He went on to give up the league 's first grand slam in September of the same year . He had a record of 18 - 9 with a league - leading 2.73 ERA that year . The following season , Zettlein played for the Troy Haymakers and Brooklyn Eckfords , combining for 15 wins and 16 losses between the two teams . He went on to win 36 games for the Philadelphia White Stockings in 1873 , then returned to the Chicago White Stockings for two seasons . Partway through the 1875 season , he rejoined the Philadelphia White Stockings , and ended his career in 1876 with the Philadelphia Athletics . He finished his career with 129 wins , 112 losses , and a 2.55 earned run average .  - James Leon "Jimmy" Wood (December 1, 1842  November 30, 1927) was an American second baseman and manager in Major League Baseball who hailed from Brooklyn, New York. He was the player-manager for four different teams in the National Association, where he spent his entire career.  - At the end of each Major League Baseball season, the league leaders of various statistical categories are announced. Leading the league in a particular category is referred to as a "title".  - William H. Craver (June 1844  June 17, 1901) was an American Major League Baseball player from Troy, New York who played mainly as a middle infielder, but did play many games at catcher as well during his seven-year career. He played for seven different teams, in two leagues. He was later expelled from the Major Leagues in the infamous Louisville gambling scandal in .  - The Philadelphia White Stockings were an early professional baseball team. They were a member of the National Association from 1873 to 1875. Their home games were played at the Jefferson Street Grounds. They were managed by Fergy Malone, Jimmy Wood, Bill Craver, Mike McGeary, and Bob Addy.    Given the information above, choose from the list below the object entity that exhibits the relation 'occupation' with the subject 'george zettlein'.  Choices: - baseball player  - canada  - cook  - game  - major  - manager  - master  - member  - prior  - relief pitcher  - softball player
The answer to this question is:
baseball player