CHICAGO, June 1 (UPI) -- Michael Bourn's RBI single during a six-run ninth-inning uprising put the Astros ahead and Houston went on to post a 7-3 comeback win over the Chicago Cubs.
The Astros erased a 3-1 deficit in their final at-bat, banging out six hits against the Chicago bullpen and roaring back to go up 2-0 in their three-game series against the Cubs.
A leadoff single by Brett Wallace (3-for-5, RBI) followed by doubles from Chris Johnson and pinch-hitter Matt Downs off Cubs closer Carlos Marmol (1-2) forged a 3-3 tie.
After pinch-hitter Angel Sanchez sent Downs to third with a sacrifice bunt, Bourn chased him home with a slicing liner over leaping Cubs shortstop Starlin Castro, putting Houston ahead.
Clint Barmes drew a walk and Hunter Pence then followed with a line-drive three-run homer to left, turning the game into a rout for Houston.
Fernando Rodriguez (1-0) got the victory after snuffing out a three-run Cubs rally in the eighth.
Rookie starter Jordan Lyles made his major league debut for the Astros, holding Chicago to one unearned run on five hits over seven frames.
Aramis Ramirez went 3-for-4 with an RBI for the Cubs.
