A radio station operating in the Pittsburgh region since 1922 has a new owner. Sports Radio Group LLC, part of the Walt Disney Co., has sold 1250 WDDZ-AM to Pennsylvania Media Associates for $1 million, according to a filing with the Federal Communications Commission. The station is based in Wilkinsburg with its former sibling television station, ABC affiliate WTAE. Disney (NYSE:DIS) has been divesting its radio stations and WDDZ was among a group put on the block last August. The station has had…