Matt Kalil 's sister sang the national anthem at the Vikings–Panthers game , where he played against his brother .
link=|border Their sister Danielle sang the national anthem at the Vikings–Panthers game , which featured both her brothers , on October 13 , 2013.On July 8 , 2015 , he married Haley O'Brien in a secret ceremony on a private beach in Kauai .
Matt Kalil