Concern for struggling prospects

Bryce Harper is still finding his way at Triple-A, and that says a lot about the 19-year-old. Daniel Shirey/US Presswire

As we approach the three-week point of the minor league season, there are a few prospects who entered the year with high expectations yet are falling well below that. It's easy to just say it's a small sample size -- and chances are that plays a huge role -- but the question remains: Are there reasons to be concerned?

Here's a look at a sextet of slow starts and why you should be concerned … or not.

Bryce Harper, OF, Washington Nationals

Entering 2012: Arguably the best prospect, and certainly the most hyped, Nationals manager Davey Johnson lobbied to break camp with Harper in the big leagues, but it was ultimately agreed upon that the outfielder would begin the year at Triple-A with the expectation of hitting the big leagues before his 20th birthday.