While Jordan Belfort was in prison for securities fraud, he began writing the book that would become Martin Scorsese's Oscar-nominated movie. This story first appeared in the March 7 issue of The Hollywood Reporter magazine.
Freebase(0.00 / 0 votes)Rate this definition: In baseball, the bullpen is the area where relief pitchers warm-up before entering a game. Depending on the ballpark, it may be situated in foul territory along the baselines or just beyond the outfield fence.
Answer by Mattyc33. Confidence votes 2. The keystone in baseball usually refers to second base. It's called such because it is important in scoring (since a runner on second is in scoring position) and because it's a key defensive position.