The Vikings are still working to trade for Kansas City defensive end Jared Allen, according to the Star Tribune. Allen visited with Minnesota on Friday night, and would need to agree on a long-term contract with the Vikings in order to facilitate a trade from the Chiefs. "It's a multi-front type of [deal]," Vikings owner Zygi Wilf said. "You have to deal with Kansas City, you have to deal with Jared. It's a whole aspect, and you have to weigh that with what's best for the club. That's ultimately what's most important. What would be the best for this club and how we can get to the next level?"