Green’s Dictionary of Slang

pitcher n.3

[pitch a yarn under yarn n.; note Arthur Binstead (1861–1914), a late 19C sporting journalist and bon viveur, whose fund of stories, retailed to cronies as well as to the readers of The Sporting Times (cf. Pink ’Un, the n.), earned him the nickname Tale-Pitcher, usu. abbr. to Pitcher]

(Aus.) a chatterbox.

[Aus]Stephens & O’Brien Materials for a Dict. of Aus. Sl. [unpub. ms.] 113: A verbose ‘pitcher’ is often requested to ‘pass the kip,’ i.e. to let somebody else pitch a yarn.
[Aus]Baker Popular Dict. Aus. Sl.