Bo Jackson: Two Games in One (Gameboy)

Now, there's a weird title. 
It's a baseball game, but it claims it is two games in one... but after seeing some gameplay, we're confused. 
It looks just like any other baseball game. Is it because you both get to shoot AND catch the ball? Does that count as two games in one? 

Imagine if they advertised modern games like that, right in their title. 
"Call of Duty: Shoot and Spawn Camp". 

Condition: Great