No, the word 'pitched' is the past participle, past tense of the verb to pitch.

(He pitched the ball.)

The past participle of the verb also functions as an adjective.

(The pitched ball went over the fence.)

The noun forms of the verb to pitch are pitcher and the gerund, pitching.

The word pitch is a noun (pitch, pitches) and a verb (pitch, pitches, pitching, pitched).

The form pitched is the past participle, past tense of the verb to pitch; the past participle of the verb is also an adjective. Examples:

Noun: The umpire said the pitch was in.

Verb: Dad helped me pitch the tent.

Verb: We pitched stones into the pond and watched the ripples spread.

Adjective: The tuba is the lowest pitchedinstrument in the band.