NEW ORLEANS — The Kansas City Chiefs are chasing history in their pursuit of a third straight championship when they face the Philadelphia Eagles in Super Bowl LIX on Sunday, but they are neither fixated on the challenge nor intimidated by it.After defeating the Eagles 38-35 in Super Bowl LVII and the San Francisco 49ers 25-22 in Super Bowl LVIII, the Chiefs could become the first team to win three straight Super Bowls.At Super Bowl Opening Night on Monday, no player or coach shied away from the moment, while also sticking to the company line about focusing on the matter at hand.”I don’t think I understand truly the weight that this has, what this moment means,” Kansas City cornerback Trent McDuffie said. “I’m trying to live in the moment, take each day as I can, and making sure I’m thankful for having this opportunity.”How rare is that opportunity? No major U.S./Canada professional sports franchise (NFL, MLB, NBA, NHL, WNBA, MLS) has managed three straight league championships in two decades. The last team to achieve it was the Los Angeles Lakers juggernaut spearheaded by Shaquille O’Neal and Kobe Bryant and coached by Phil Jackson, which won three straight from 2000-02.Before that, the New York Yankees won three in a row from 1998-2000 as the Houston Comets were also winning four in a row (1997-2000) in the WNBA.Jackson coached Michael Jordan and the Chicago Bulls to a pair of three-peats (1991-93, 1996-98) earlier in the 1990s. The most recent NHL three-peaters were the New York Islanders, who won four in a row from 1980-83.If you’re counting along, that’s just six teams to do it since 1980, a span of 45 years.”We’ve got a lot of guys who have been doing this a long time,” Chiefs linebacker Nick Bolton said. “We know we’ve got the opportunity. If you get to this point of the year … just put your faith where it belongs and put your best foot forward.”