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Nelson is slated to serve as Arizona's opening pitcher for Sunday's season finale against Astros.

The Diamondbacks clinched a playoff berth despite losing Saturday, so Arizona will presumably look to rest its key pitchers in the regular-season finale in advance of the postseason. It's unclear if manager Torey Lovullo plans to use a bulk reliever behind Nelson, or treat the contest as more of a bullpen day. Either way, Nelson is unlikely to work more than inning or two Sunday.

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