What does the statistic WHIP measure?

What is it called when a batter hits a single, double, triple and home run in one game? What is the nickname for striking out four times in one game? What is an "immaculate inning"? In baseball slang, what is a "Maddux"? What does OPS combine? What does WAR stand for in baseball statistics? In scorekeeping, which number represents the center fielder? In scorekeeping, which number represents the third baseman?