With the major league season reaching its midpoint and the bulk of high picks from this year's draft already agreeing to contracts, it's a good time to re-examine farm systems to see which organizations have improved or declined since my organizational rankings at the start of the season.

For the purposes of this exercise, some parameters to keep in mind:

1. I'm only including draft picks who've signed.

2. I'm going to assume players in the majors right now are going to lose their rookie eligibility and won't count for the next org rankings I do in the winter. (This matters because graduating prospects will hurt a system as much as a lack of performance.)

With that noted, let's take a look.

Rising systems

Minnesota Twins | Preseason rank: 2

The Twins have benefited from big jumps by several of their top prospects, balancing out the promotions of their No. 3, 4, and 5 prospects to the majors this year.