Dan Haren is 34 and has a history of pitching his worst ball during the second half of the season. Haren is away from Marlins Park, which was the third-hardest park in the majors to hit homers.



Haren makes his Cubs debut in Pittsburgh. Haren has a 4.16 ERA this season and has given up 14 of his 21 homers away from Marlins Park. In 10 career starts versus the Pirates, Haren has a 5.28 ERA.



Pittsburgh starter Jeff Locke doesn't match up well either here. The southpaw has a 4.21 ERA and is below the league average in strikeout and walk ratios. The Cubs rank first in walks against lefties and are fifth in on-base percentage against them.



Chicago already has faced Locke three times this season and tagged him for 15 runs, of which 14 were earned, in 12 2/3 innings. Locke has given up 21 hits and nine walks to the Cubs in those 12 1/3 innings.