Why did Darrel Waltrip stop announcing for Nascar races in the middle of last season?

May be...

Darrell Waltrip only announces for Fox.
Fox only broadcasts certain races.
Come February, they'll be broadcasting again.

thank you winter glory for that fine answer
and a fine boogity boogity boogity it will be

Darrel Waltrip stopped announcing when fox ended
and i think tnt took over
they go from anouncer to announcer when the channels change i guessigns file format