<page_title> List of Pittsburgh Pirates seasons </page_title> <section_title> Season by season </section_title> <table> <cell> 2015 <col_header> MLB season </col_header> <col_header> Pittsburgh Alleghenys </col_header> <col_header> Pittsburgh Pirates </col_header> </cell> <cell> NL <col_header> League </col_header> <col_header> Pittsburgh Alleghenys </col_header> <col_header> Pittsburgh Pirates </col_header> <row_header> 2015 </row_header> </cell> </table>
The 2015 Pittsburgh Pirates season was the franchise's 134th season overall, the 129th season as a member of National League.