This has been a busy month for minor league roster moves.
When I started this site 16 years ago, the MLB Draft was held in June. Teams had two months to sign their draft picks. The MLB Trade Deadline was at the end of July, but there was also a second trade deadline at the end of August which involved the waiver wire. As a result, there were three full months where MLB systems saw changes from added draft picks, and players added/removed from the system in trades.
Today, the draft, all of the draft pick signings, and the lone trade deadline are crammed into a stretch of less than three weeks.