On Saturday, Pittsburgh Pirates pitcher Paul Skenes will make his MLB debut against the Chicago Cubs. Skenes began his minor league career last August and has earned one of the quickest call-ups to the majors ever.

Skenes is unlike any pitcher the majors have seen before as he has a 100-plus MPH fastball and an equally effective slider that can buckle the knees of any opposing hitter.

The 6-foot-6, 240-pound right-hand pitcher has a strong case of being the greatest pitching prospect of all time. Senior Writer for MLB.com Jim Callis weighed in on the subject, placing Skenes in the rarified company of former elite pitching prospects Stephen Strasburg and Mark Prior.