As stated elsewhere in this thread, there could be a sticking point when the next MLB CBA agreement comes to the fore (strike?) having to do with the subject of service time (for prospect callups) or to put it simply, "contract control" by teams.
It has been reported that Vladdy Guerrero Jr., was upset about not being on the September callup list (as most baseball observers wondered why he was still in the minors when he clearly had passed that scope). The Jays Shapiro had his reasons and the MLBPA clearly did not take this kindly (as applied to teams all across the league).
As The Athletiic's in-depth article explained, baseball is indeed a convoluted sport, in fact the only sport of the major professional leagues in North America that limits, controls, or manipulate's a young prospects contract to buy back time, etc. Plenty of solutions were looked at or suggested in the article, but none perfect (the NHL model, the NFL & NBA models) to name a few. Each had it's plusses & minuses. Besides, for their own reasons given, many teams believe that the minuses outweigh the plusses.
Anyway, Vladimir Guerrero Jr. may file a grievance against the Jays organization.
Some way to begin a relationship with the parent squad, eh? And it may not stop with Guerrero, as others may take the initiative or the impetus to do same.
https://jaysjournal.com/2018/09/30/blue-jays-report-vladimir-guerrero-jr-may-file-grievance/