So, the last five spots generated quite a bit of discussion. If you missed it, go check it out first. Otherwise, let's get right down to business.
20. Tyler Heineman
Heineman quickly made his presence known in a big way with Tri-City. As a catcher, he threw out 41% of would be basestealers while putting up a monster OBP, spraying doubles, and showing a strong inability to strikeout. As an 8th round pick out of college, Heineman will likely move through the system quickly if he keeps up this level of production. He should start the year in A ball and could sneak into AA by the end of the season, though I think it's unlikely.
19. Robbie Grossman
Grossman is another high on-base ability prospect added this past season. He's played all three outfield positions relatively solidly and has the ability to steal a few bases as well. Originally a 6th round pick out of Cy-Fair High by the Pirates, Grossman was acquired in the Wandy Rodriguez trade. He spent the season in AA and should start in AAA next year, with an outside shot of seeing time as a late-season call-up.
18. Carlos Perez
Despite spending the season in High A ball, there was some concern Perez was a potential Rule 5 selection this off-season. Thankfully, that didn't happen so the Astros get to keep this strong catching prospect in the system. Perez has gained acclaim for his improved defensive ability while routinely hitting for a good average with a strong on-base percentage as well. Perez was originally signed out of Venezuela by Toronto and came to the Astros in the multi-player deal this past summer. Perez will likely start the year in AA.
17. Ariel Ovando
Ovando took steps towards fulfilling his massive potential as he repeated with Greeneville. Known for his massive power potential, Ovando is still quite raw. However, eyewitness reports indicate that he appeared much more focused this past season, both at the plate and in the field. Ovando was given a $2.6M signing bonus by the Astros when they inked him out of the Dominican Republic. I imagine Ovando will get his first test of full-season ball this year, likely with Quad Cities.
16. Josh Fields
Fields has the ability to put up eye-popping strikeout numbers, but always had control issues to go along with them. However, 2012 may have been the year he figured it out and started realizing the potential that led to him being a 1st round pick by Seattle in 2008. After being traded to Boston in 2011, Fields was selected by Houston in the 2012 Rule 5 draft. Assuming he doesn't implode during Spring Training and get returned to Boston, he'll break camp in 2013 as a member of the 25 man roster.