The site MLB Farm is a great place to check on @prospects throughout the year, but @eamuscatuli has gone one step further and now created a tracker tool that converts MiLB stats into Ottoneu FGPTS scoring. The tool defaults to YTD, but you can also select Yesterday, Last Week, or Last Month if you want to see a shorter window. Separate tabs for hitters and pitchers, this tool takes the Top 100 from MLB Farm and auto-calculates minor league player stats (and MLB for those in the Show). Enjoy.
Here is the Top 100 Tracker tool https://docs.google.com/spreadsheets/d/1fv9QyytpsdB_4858qaq2BtYBqY_geCUMtlv3bYI3uy0/edit?usp=sharing