The Pirates are involved in discussions with right-handed starter Jeff Weaver, a source close to Weaver said last night. Agent Scott Boras did not return phone calls the past two days, but it has become known that the Pirates are one of a handful of teams pursuing Weaver, with the St. Louis Cardinals being another and, possibly, the New York Mets and Seattle Mariners in the mix, too. It is believed that Weaver's offers are in the range of two years for markedly less than th