PHOENIX -- Wade Miley has not had the success he wants or expects in his last two outings, and the D-backs' left-hander thinks he knows why.

"Trying to be too fine," Miley said. "I've kind of gone back to how it was when I first got called up last year, like I've got to make a perfect pitch here and a perfect pitch here, and suddenly you're down 2-0 and you've got to throw a fastball, and they're looking for it. I kind of got caught up doing that. Just a lot of thoughts running through my mind."

Miley's performance this year has put him in the conversation for the National League Rookie of the Year Award, but in his last two starts he has a 7.20 ERA .

With one start left -- Monday against the Rockies -- Miley wants to get back to form.

"I want to just go out and compete, and hope for the best and not put too much thought into [the game]," Miley said. "I think that's what's gotten me into trouble lately, thinking a little too much. I just have to clear my mind and go out and compete like I did the first 25 starts."

Eaton done for year with broken right hand

PHOENIX -- D-backs rookie outfielder Adam Eaton was diagnosed with a fractured right hand Saturday night after being hit with a pitch in the seventh inning of the club's 8-2 victory over the Cubs.

The recovery time is estimated around six to eight weeks, ending the 23-year-old's season with only four games remaining on the schedule.

Since being called up from Triple-A Reno earlier this month, Eaton has appeared in every game for the D-backs since Sept. 4.

The outfielder compiled a .382 on-base percentage to go along with two home runs and 19 runs scored.

Before his promotion to the Major Leagues, Eaton was named the MVP of the Pacific Coast League.

Goldschmidt misses second game with stiff back

PHOENIX -- D-backs first baseman Paul Goldschmidt was out of the starting lineup Saturday for the second straight day due to a stiff back.

The D-backs did not seem to believe the injury is anything to be concerned about.

"He takes care of himself probably as good as anybody, he's really on the program," D-backs manager Kirk Gibson said. "It's not like he did something and felt something, it just tightened up, it's never happened before."

Goldschmidt first experienced the stiffness after taking grounders during batting practice Friday night.

"He's much better today, but we're not going to play him," Gibson said. "It just stiffened up yesterday. Took ground balls and got stiff, kind of locked up last night, much better today."