OneSeason.com on Wednesday launched its new Web-based sports stock market, developed with $250,000 in seed funding from investor Phil Drayer, Reuters reported. The site allows users to trade real-world money based on the performance of individual athletes, teams and other sports-related variables. It also features sports news and social networking elements. Michael Sroka, the 27-year-old founder of San Francisco-based OneSeason.com, told Reuters he thought annual revenue from the venture could hit $50 million to $100 million -- if the site reaches 3 million users after a few years. Similar ventures, such as the Cantor Fitzgerald-owned Hollywood Stock Exchange, allow users to trade in movie stars, musicians and other celebrities.