Definitions by Jacque le Franc

Splinter Catcher 

Person who rides the "pines", i.e., person who typically isn't a starting player on a football, baseball, basketball team and spends most of the game sitting on the bench.

Percy, your Splinter Catcher today until you out play Jack at first base.

Splinter Catcher by Jacque le Franc September 15, 2012