Read'em all, but hardly join in. However, here it goes:
It is unfair to judge Sammy's command, or lack thereof, of the English language. After all, Henry Kissinger, whom was born in Europe, but has lived in the US for much of his life, has an accent.
Oscar De La Renta has an accent; and so does Antonio Banderas and Selma Hayak. Claudia Schiffer has an accent, too.
As someone previously posted, it is next to impossible to speak another language without a trace of the original if exposure to it takes place during your teen years or later.
When Sammy says, "Beisbol has bin berri berri goo to mi", he is mimicking a character from SNL named Chico Escuela, and who hailed from the DR, and who would respond to any question by saying, "Beisbol....."
I believe that Sammy had some people that would advice him on how to play the game in front of the cameras, and the US media ate it up. "Just act bubbly, Sammy, smile and make fun of yourself." US media feasted on it, and Sammy made more money from endorsements than ever before.
Sammy's command of the language is good enough for government work. I understand him perfectly.
English, with its constant variations, is plain hard. I'm still confused after all these years.