Dansby Swanson started Chicago’s six-run sixth inning with a hit, then capped the rally with an RBI single as the Cubs overcame a four-run deficit to beat the Pittsburgh Pirates 10-6 on Wednesday night.

Swanson finished with three hits and two RBIs to help Chicago knock off Pittsburgh, still in first in the weak NL Central, for the second straight night. The Cubs had 13 hits - 12 singles - to reach double-digits in hits and runs again.

The Cubs also were patient at the plate, leveraging seven walks to make the base paths busy late in the game,

Mike Tauchman had three hits, two RBIs and made a running catch against the ivy on Carlos Santana’s sac fly in the seventh. Ian Happ and Seiya Suzuki each drove in two runs in the Cubs' fourth win in five games.

Santana lofted a two-run homer and finished with four RBIs. Andrew McCutchen cracked the 22nd leadoff homer of his career and Austin Hedges added a solo shot.

Bryan Reynolds had three hits, scored three runs and made an over-the-shoulder catch in left in the second of six games in nine days between the division rivals.

The Pirates were cruising with a 5-1 lead before the Cubs sent 11 men to the plate in the sixth. Roansy Contreras (3-6) the first of five Pirates relievers, yielded five runs on three hits and two walks over 1 1/3 innings to fuel the rally as he struggled with his command.

The Cubs scored the first run on a bases-loaded walk to Nick Madrigal on a pitch-clock violation against Contreras. Tauchman singled to make it 5-4

Happ grounded a two-run single to left to put Chicago ahead 6-5, then Swanson plated a run.

Chicago starter Drew Smyly (6-4) ended a three-game losing streak despite allowing five runs on nine hits in six innings. Three relievers closed it out, with Adbert Alzolay throwing a scoreless ninth.

Pittsburgh’s Osvaldo Bido started in his major league debut. The rangy 27-year-old right-hander allowed one run on four hits, while striking out six through four innings.

The Pirates cut it to 7-6 in the seventh on Santana’s sac fly. The Cubs scored three in the eighth, two on Suzuki's double, to ice it.

Marcus Stroman (7-4, 2.42) takes the mound in the series finale Thursday night. The Pirates had not yet named their starter. Stroman is 5-0 with a 1.26 ERA since a loss in Minnesota on May 14 and leads the majors with 12 quality starts.