This is a sports idiom. If you're not playing well enough, the coach makes you sit on the sidelines of the field instead of joining the game. If you are sitting on the sidelines, you are not participating. You have been "benched." The idiom means that you're not part of whatever is going on.
Football Sidelines was created in 1952.
Sidelines of the City was created on 2007-10-23.
ESPN Sidelines - 2000 was released on: USA: 2000
On the Sidelines - 1929 was released on: USA: 5 August 1929
The sidelines in basketball mark the out of bounds mark. If you cross it and you are on offense you turn the ball over.
The cast of The Sidelines - 2011 includes: Amy Dawson as Prudence
Sports that uses sidelines are baseball, criket, football, soccer and more.
sideline
Yes.
Eye on the Bay - 2005 On the Sidelines was released on: USA: 3 February 2012
The cast of Football Sidelines - 1952 includes: Harry Wismer as Himself - Host