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Daily Fantasy Sports Growth Pushes Leagues to Regulate Players

Updated on

The rapid evolution of fantasy sports from casual season-long recreation to high-stakes daily Internet games has given U.S. professional sports another source of revenue as well as a headache in determining player-participation policies.

Over the last year, all four major U.S. sports leagues signed sponsorship deals with daily fantasy websites through players, teams or the league itself. They are now promoting a business that, while legal in most of the U.S., resembles sports gambling because participants profit by correctly predicting success.