CHICAGO — The Chicago Cubs have added rookie left-hander Rob Zastryzny to their roster for the NL Championship Series against the Los Angeles Dodgers.

Zastryzny takes the place of infielder Tommy La Stella, who appeared in just one game in the first round against San Francisco. Zastryzny went 1-0 with a 1.13 ERA in eight games this year, including 3 2/3 scoreless innings at Dodger Stadium on Aug. 27.

The move puts four left-handers in the Cubs’ bullpen. The Dodgers hit .213 against lefty pitching this year.

Game 1 is Saturday night at Wrigley Field.