How much longer do we wait for Castellanos?

I was very high on Castellanos for a long time. I really thought he had solid potential to plug the 3rd base hole for the Tigers for a while. But he's hitting only .237 without great power and not a great OBP. Plus his defense isn't stellar either.

Compared to 3B's in the Majors with 100+ ABs, Nick ranks:

AVG: 23rd

OBP: 24th

SLG: 22nd

And again, this is with what appears to be sub-average defense. (I don't think Castellanos is horrible defensively, but he isn't great either.)

How much longer do wait to see if he gets it together? Granted, he's still young... only 23. But I don't see signing of improvement really. Am I giving up too soon? Is there still time for him to develop into an above average third baseman in the majors?

Granted, we have a super-small sample size from Romine this year, but his offense right now, if it was over more than 100 ABs, would put him 1st in AVG, 1st in OBP, and ... okay, his SLG sucks, but still... even with a 26th best SLG he'd still rank 12th in OPS... 12 spots ahead of Castellanos. And he's got plus defense.

Okay, reality check here: I'm not arguing that Romine is or will end up being a better hitter in his career than Castellanos. I am arguing that at least right now (with a very small sample size), Romine is providing more offense and more defense than Castellanos. And when we're struggling mightily to get the offense going, why not using Romine more? At least once or twice a week until he shows his offensive numbers are a mirage.

On a side note, other than the the two year "Miggy at 3rd" experiment, when was the last time the Tigers had a 3rd baseman who was really good? A player that most other teams would have gladly taken to replace their guy at the hot corner? I think you have to go back to 2000 when Dean Palmer put up 29 homers.