DraftKings (NASDAQ: DKNG) benefited from a rebounding sports calendar to post significant sales growth through late September. The sports betting specialist on Friday revealed that revenue jumped 98% year over year in the fiscal third quarter. Much of that gain came from its acquisition of the Diamond Eagle business, but sales still rose 42% after adjusting for that purchase. Executives credited the restarting of the professional sports calendar for helping push DraftKings' pool of active users up 64% to over 1 million. "The resumption of major sports such as the NBA, MLB, and the NHL in the third quarter generated tremendous customer engagement," CEO Jason Robins said in a press release. Image source: Getty Images. Investors have been growing more optimistic that increased sports betting access would help lift DraftKings' business even as the sporting calendar allows for a wider range of betting activity. Executives cited both those favorable trends as they boosted their short-term outlook. DraftKings now sees sales rising to between $540 million and $560 million this year, equating to organic gains of between 25% and 30%. Management's previous outlook had predicted revenue between $500 million and $540 million. The company also introduced a 2021 forecast that called for a further 45% sales boost next year that would push its annual sales base to between $750 million and $850 million. That forecast involves several major assumptions, including no further disruption to the sports calendar from the COVID-19 pandemic. 10 stocks we like better than DraftKings Inc.When investing geniuses David and Tom Gardner have a stock tip, it can pay to listen. After all, the newsletter they have run for over a decade, Motley Fool Stock Advisor, has tripled the market.* David and Tom just revealed what they believe are the ten best stocks for investors to buy right now... and DraftKings Inc. wasn't one of them! That's right -- they think these 10 stocks are even better buys. See the 10 stocks *Stock Advisor returns as of October 20, 2020 Demitri Kalogeropoulos has no position in any of the stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. The Motley Fool has a disclosure policy.Source