Hays fell just short last season. He has lost his rookie status.
Quite the coincidence that the O's just happen to have guys fall just short two years in a row. Just their good luck that they will still be eligible for those offseason prospect rankings.
Mountcastle will retain his rookie eligibility next year, having finished the season with 140 PAs but 126 ABs, leaving him four ABs shy of the 130 AB rookie threshold.
Also, Austin Hays finished with 134 PAs but 122 ABs, leaving him eight ABs shy of 130— I'm not sure, will he still be a rookie next year as well? Or was he technically on the MLB roster for 45 days pre-September? (I'm not sure how this works with the IL and the shortened season.)