Series preview: Pirates at Cubs
All games on WSCR-AM 670.
Season series: Pirates 5-4.
Friday: 1:20 p.m., CSN.
RH Trevor Williams (3-3, 4.67) vs. RH Eddie Butler (4-3, 4.18).
Saturday: 6:15 p.m., FOX-32.
RH Ivan Nova (8-6, 3.24) vs. RH Jake Arrieta (8-6, 4.33).
Sunday: 12:10 p.m., WGN-9.
RH Jameson Taillon (5-2, 2.73) vs. LH Jon...