While two-way players are rare, they are extinct at the Major League level for the simple reason that playing in the field and pitching requires unusual talent to do well at either.
Still, McKay would like to do both. And he has the credentials to do so.
McKay's swing is compact, but powerful. He has shown the ability to drive the ball to the opposite field or pull a ball with power. Enhancing those characteristics is a selective eye. He is athletic, and, no surprise, he has an above-average arm. He hit .363 with 17 home runs and a 1.