The term 'ballpark fig' is a phrase used to describe an estimate or guess of a number. The crossword solutions for this term are AVG (Average), ERA (Earned Run Average), UMP (Umpire), EST (Estimate), MGR (Manager), and RBI (Runs Batted In). AVG is a statistic used in baseball to measure the performance of a batter over a season, ERA is a statistic used to measure the performance of a pitcher over a season, UMP is an abbreviation for umpire, EST is an abbreviation for estimate, MGR is an abbreviation for manager, and RBI is a statistic used to measure the number of runs a batter has driven in over a season. All of these terms are related to baseball and can be used to provide a ballpark figure when estimating a number.