Chicago Cubs square off against the Pittsburgh Pirates Saturday

Pittsburgh Pirates (29-42, fifth in the NL Central) vs. Chicago Cubs (42-28, first in the NL Central) Chicago; Saturday, 2:20 p.m. EDT PITCHING PROBABLES: Pirates: Mike Burrows (1-1, 5.00 ERA, 1.39 WHIP, 17 strikeouts); Cubs: Matthew Boyd (5-3, 2.