The lone Cub on the list or even particularly close to it, Amaya struggled as an 18-year-old in the advanced short-season Northwest League in 2017, putting up a .266 OBP. But another year of growth had him a different player in the full-season Midwest League, where he hit .256/.349/.403 and threw out 41 percent of opposing runners. Amaya is an offensive catcher, perhaps a future average defender with a plus arm, but a potential 55-grade hitter with average power and a solid idea of the strike zone. He has to continue to get stronger, if only for durability. He slugged .478 before the major league All-Star break but hit .198 with a .223 slugging percentage after it, which isn't surprising for a 19-year-old at a very demanding position, but it's a clear area for improvement.
Amaya has a very simple swing and approach, with a direct path to the ball, good balance through contact and enough loft for 15-plus-homer power, perhaps more if he gets stronger than expected. He will turn 20 in March, so there's risk here, but right now, he looks like a solid everyday catcher with a high floor as a quality backup.
From the little that I follow the minors, Amaya seems to be coming along. That kid will undoubtedly have a big-league career in the not-so-distant future.