More than any other sport, baseball is a game of numbers. Certain figures mark the passage of the game and stand as easily identifiable touchstones of performance. Just seeing 42, 56, .406, 61*, or 73* will conjure up images of players and moments. A .300 average remains the de facto mark of elite hitting, while the Mendoza Line means something else entirely.
Then there are those career-defining totals that tell the story of a given player in relation to his total career or his time with a given team. For instance, you may know that beloved Cubs hero Anthony Rizzo hit his 200th career major league homer against the Marlins at Wrigley Field on May 7, followed by his 200th Cubs homer on May 9.