PHOENIX (AP) - Mark Reynolds drew a bases-loaded walk in the ninth and the Arizona Diamondbacks beat Los Angeles 4-3 on Wednesday night to slice the Dodgers' NL West lead to 2.5 games over the surging Colorado Rockies.

The winning rally began when Ramon Troncoso (4-3) threw away Gerardo Parra's roller to the mound, allowing him to reach second on the error.

Trent Oeltjen ran for Parra and took third on Ryan Roberts' sacrifice. After intentional walks to Stephen Drew and Justin Upton, Troncoso missed with a 3-2 pitch to Reynolds, who had fouled off a pair of pitches with two strikes.

Juan Gutierrez (4-3) pitched out of a jam in the eighth and got the final five outs for the Diamondbacks.

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