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ENIX -- Losing a heartbreaker to the Padres on Thursday, the D-backs fell further behind in the National League Wild Card hunt with 13 games remaining in the regular season.
Trailing by a run in the bottom of the ninth inning, the D-backs worked the bases loaded with nobody out but failed to score the tying run, resulting in a 6-5 loss.
While the D-backs couldn't complete their sweep on Thursday, the Cardinals got the job done against the Astros in St. Louis, taking their third straight versus Houston, 5-4.
After Thursday's action, Arizona trails the Cardinals by 5 1/2 games for the second NL Wild Card spot.
If the D-backs hope to make their second straight postseason appearance, they will have to leapfrog the Cardinals, Dodgers, Brewers, Phillies and Pirates.
With the loss, the D-backs (74-75) moved back under .500 after reaching the even mark with a win on Wednesday.
The club will begin a four-game series in Colorado on Friday with NL Rookie of the Year candidate Wade Miley taking the mound.
To calculate a team's magic number, take the number of games it has remaining and add one. Then
subtract the difference in the number of losses between that team and its closest pursuer.
A tiebreaker game will be played to determine a division winner, even if the tied clubs are assured
of participating in the postseason. If a division championship tiebreaker is necessary, the head-
to-head record between the clubs will determine home-field advantage. If the head-to-head record is
tied, then the division record will be the next tiebreaker.
If two clubs are tied for the two Wild Card berths, home-field advantage will be determined by the
head-to-head record between the clubs. If the head-to-head record is tied, then the division record
will be the next tiebreaker.