Edward Trowbridge Collins Sr., nicknamed "Cocky", was an American professional baseball player, manager and executive. He played as a second baseman in Major League Baseball from 1906 to 1930 for the Philadelphia Athletics and Chicago White Sox. A graduate of Columbia University, Collins holds major league career records in several categories and is among the top few players in several other categories. In 1925, Collins became just the sixth person to join the 3,000 hit club – and the last for the next 17 seasons. His 47 career home runs are the fewest of anyone in it. Collins is the only non-Yankee to win five or more World Series titles with the same club as a player. He is also the only player to have been a member of all five World Series championships won by the Athletics during the franchise's time in Philadelphia.

In baseball and softball, second baseman, abbreviated 2B, is a fielding position in the infield, between second and first base. The second baseman often possesses quick hands and feet, needs the ability to get rid of the ball quickly, and must be able to make the pivot on a double play. In addition, second basemen are usually right-handed; only four left-handed throwing players have ever played second base in Major League Baseball since 1950. In the numbering system used to record defensive plays, the second baseman is assigned the number 4.