As often happens in baseball when you have 40 rounds of the Amateur Draft and International signings, players do not advance as hoped in their career. It can especially painful when those players were listed on highly on the KC Royals prospect lists.
Giving them another opportunity and freeing up room in the organization to promote other players is beneficial for the prospect and franchise. A change of scenery can breathe fresh life into the player and give them the incentive to prove they belong.
It could be injuries that cause the downfall, personal issues, bad timing or a slew of other reasons.