When it comes to their 2017 starting quarterback, the Vikings are taking it one week at a time. When it comes to their 2018 starting quarterback, the Vikings aren’t taking it, at all. Per a source with knowledge of the situation, the team intends to wait to decide on their 2018 quarterback after the 2017 season fully plays itself out. It’s a risky strategy, given that none of the quarterbacks under contract for 2017 — Case Keenum, Teddy Bridgewater, Sam Bradford, and Kyle Sloter — has a deal beyond the current season. (Sloter will be an exclusive rights free agent, which means the Vikings can control his rights with a minimum-salary tender.) Another source tells PFT that the Vikings and Keenum have had no conversations about a contract that would replace the one-year, $2 million deal he signed in the offseason. Forced to bet on himself, Keenum keeps flipping solid cards, week after week. Remember when the Vikings entered the bye week at 6-2 and some pointed out that he’d beaten a revolving door of young and unproven quarterbacks, from Jameis Winston to Mitchell Trubisky to to Brett Hundley to DeShone Kizer? Since then, Keenum has pushed the team to an average of 30.6 points per game, outdueling the likes of Kirk Cousins, Jared Goff, and Matthew Stafford, the highest-paid player in the game.