We're about a fourth of the way through the minor league season, and a number of players from my ranking of the Top 100 prospects for 2010 have already made an impact in the big leagues this year, so it's a good time to check in with the Top 25 guys and fill the gaps with new players who have made serious leaps forward this year. I've addressed the players who have graduated from the original list -- their old rankings are next to their name -- and then go into the new rankings.
13hCraig Custance and Johnette Howard
23hMike Vorkunov for REDEF
22hAndrea Canales, ESPN.com