Playback Question

[Roger Kirk]

Walt Perkins does sports live in the morning, but appears to record a 
couple for after his air shift is done.

1. Does he get paid only to record these sportscasts?
or
2. Does he get paid to record them and paid again when they are played 
on-air?
or
3. Does he only get paid when they air?

I'm asking, because I don't understand why they don't continue to use 
his recorded sportscasts later in the day instead of having the air 
announcer do it.