When you get a guy on base, or are the pitcher and have a CPU player on 1st try picking him off and tell me if any part of him sliders thru the first basemen.
Also...if you're running down the first baseline or the CPU is look to see if any part of the runner is going thru the player covering the bag.
This would ultimately lead to collision detection being null and void, and would more than likely mean there are no take-out slides.