Answers from sportingo.com and answers.com
1. Soccer (association football, also known as futbol in various Spanish-speaking countries)
2. Cricket
3. Rugby
4. Field Hockey
T5: Baseball
T5: Basketball
There are often minor variations in this list. IMPORTANT NOTE: if you see an answer stating volleyball (998 million players) is the most popular, you have been tricked by this completely false website:
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