Mike T, good points on Sheffield. He had to be the negative influence as you stated. Even on Joe Torre. Sheffied is my prime example of a ball player who is vastly over rated. His stats look good but he detracts more than he adds to a “team.”

As far as a negative influence on a player look back to Mel Hall. When he left the Yankees Bernie became a good player.

A-Rod does benefit from the patient Abreu batting in front of him.