The "second baseman" is a key player in the sport of baseball, positioned between first and second base. This player is responsible for covering second base and turning double plays. There are a few synonyms for the term "second baseman" like "2B," "keystone," and "intermediary." The term "2B" is commonly used in baseball statistics, and "keystone" refers to the position's strategic importance in the defense lineup. "Intermediary" highlights the player's role in facilitating defensive communication between teammates. Overall, whichever term is used, the second baseman's key responsibility remains the same - to help his team obtain outs and win the game.