The Toronto Maple Leafs will be without their captain for the next three weeks, as John Tavares has been ruled out that long with an oblique strain suffered on the weekend, according to Lance Hornby of Postmedia. A three-week absence essentially ends Tavares’ training camp and likely rules him out for the first few regular season matches, as the Maple Leafs are set to open up their schedule on October 12, just 15 days from now. While it isn’t a huge chunk of the season, Tavares is now 32 and missing training camp will only put him behind the competition…