Coach's box
The coach's box is a term used in numerous sports. In baseball, it is the space where the first base coach and third base coach stands.
It is also common practice for a coach who has a play at his base to leave the coach’s box to signal the player to slide, advance or return to a base. This may be allowed by the umpire if the coach does not interfere with the play in any manner.[1]
In basketball, it's a line that represents how far a coach may come towards centercourt. In soccer, the coach's box is simply a term for the typical area that the coach or manager is standing.
In NCAA basketball, many coaches step out on the floor, leaving the coach's box. The most famous free roamers are Kentucky coach John Calipari, Baylor coach Scott Drew, and Michigan State coach Tom Izzo.