This week we take another tour around the minors to see who's hot, who's not, who's hurt, and who's in the midst of a breakout. While the 2012 season is still in its infancy and sample sizes are small, we are getting to the point where we can start drawing some conclusions. Certainly the recent promotions of Bryce Harper, Mike Trout, and Will Middlebrooks indicates that teams have seen enough to start making promotions and roster changes.

Call-ups from the minors for May 3, 2012: Middlebrooks and Kratz.

With the 2012 minor league season in full swing, we take our first tour around the minors to see who's hot, who's not, who's hurt, and who's ready to break out.

Call-ups from the minors for April 26, 2012: Miller and Hottovy.

While the 2012 season is not yet a month old, injuries and slow starts are already prompting clubs to consider making roster changes. Many of the early season call-ups will hardly cause a ripple in your free agent pool, but there are impact prospects who could reach the majors sooner than anticipated.

Call-ups from the minors for April 19, 2012: Pollock and Tazawa.

Now that the dust has settled on spring training and 25-man rosters have been finalized, we can get a clearer picture of the likely candidates for the 2012 AL and NL Rookie of the Year Awards. While there are plenty of high-profile prospects expected to be the early pace-setters, the rookie of the year field is notoriously difficult to handicap.

Call-ups from the minors for April 12, 2012

Call-ups from the minors for April 9, 2012

Call-ups from the minors for April 8, 2012

This is the last installment of our annual review of the top prospects in baseball by position. With the regular season starting, some of the players listed below have won jobs in the big league bullpen while others are on the cusp waiting for their opportunity. Unlike other positions, there aren't many top relief pitching prospects in the lower minors.