A Colombian international signee acquired from Texas in the Cole Hamels trade, Alfaro is a five-tool catching prospect with plus-plus arm strength. The hit tool shows average potential despite an aggressive, swing-heavy approach with a high propensity for swing-and-miss. He offsets those vulnerabilities with the ability to make hard contact, use the middle and opposite side of the field, and scratch out infield hits with his speed. Above-average raw strength and the ability to create hard contact should result in average power output, while his tendency to produce lower-trajectory hits could result in more doubles than home runs. The strength is there to leave the yard, however. He's a max-effort runner up the line and will show present plus speed, though the demands of the position are likely to diminish that.

Alfaro is a solid receiver behind the plate, though he'll get too comfortable at times and stab at balls rather than use his athleticism. Plus-plus arm strength helps to combat the running game. Has the offensive tool set to be more than just a catch and throw receiver, with the overall ability to develop into an above-average catcher.