Not really equivalent, except possibly number three, which should be rephrased "in sports, I like baseball the best".

We might say ""I like baseball the best of all sports.", but it is incorrect grammar. Should be: "I like it the MOST" (most is an adverb, describes like). should be either: "Baseball is the best" or "I like it the most". but a native speaker may mix these two and say "I like it the best", which is actually incorrect. these are correct: 1. I like baseball most, of all sports. 2. As for sports, I like baseball 3. I like baseball the most out of all sports. 4. I like baseball, of all sports. 5. Baseball is the best of all sports.

Thanks to all of you! From your comments, it seems that the sentense "I like baseball the best of all sports." could be grammatically wrong. Unfortunately this sentense is written in English textbooks in my country as a good example :( Thank you again for your posts!

"I like baseball the best of all sports." It makes no sense to me like that, I assume it should be "I like baseball, (which is) the best of all sports"