Trailing 6-4 in the seventh, the Rockies tied it up on a two-run homer by Michael Cuddyer.
Then in the 10th, Torrealba, pinch-hitter Wilin Rosario and Fowler delivered consecutive singles off Matt Guerrier (1-2) to complete the Rockies' comeback, which evened the three-game series.
Fowler ended with two RBI and Carlos Gonzalez launched a two-run homer for Colorado.
Matt Belisle (3-2) got the decision after tossing a 1-2-3 top of the 10th.
Tim Federowicz belted his first major league homer and added a two-run double for the Dodgers.