It’s important to know which current young MLB players that are now out of minor league options. If they are struggling, they can’t demote him unless they first put him on waivers. It would make him available for any MLB team to claim him and take on their contract. Some good players do get through waivers, but it’s due to their contract being too big to take on.
A notable player that could be affected is Dylan Bundy (Orioles) who struggled with injuries in the minors. He was once a top prospect, so the Orioles will try to keep him on the 25-man roster. He will be given every opportunity to improve while on the Major League roster.
I need to give a huge shoutout to MLBTradeRumors.com for this list. It consists of players with less than five years of serve time and are out of minor league options.