It's hard to win in the NFL. While "they'll be back" is a phrase often used as Louis Head Jersey consolation when a team loses a Super Bowl, that only occasionally turns out to be true. For Super Bowl champions, climbing back to the top of the mountain is no easy task, either.It's been nearly two decades since any team won back-to-back Super Bowls, even with legendary teams coming and going over that span. That drought could end on Sunday in Las Vegas.The Chiefs are just one win away from winning consecutive championships, which would make their run an unquestioned dynasty. Kansas City is a slight underdog, but with Patrick Mahomes at quarterback, it's tough to underestimate the Chiefs' ability to win one more.Here's a look at the last back-to-back Super Bowl champion and how many teams have achieved the feat in NFL history.MORE SUPER BOWL 58: | | Who was the last back-to-back Super Bowl champion?No team has won back-to-back Super Bowls since the 2003 and '04 Patriots. New England won three championships in Tom Brady's first four seasons as a starter, going from a stunning underdog run in '01 to a dynasty by '04.The Patriots followed up their spectacular 2001 run by mi sing the playoffs in '02, but they proved in '03 that their run was no fluke. New England won a tight battle over the Panthers in Super Bowl 38 to claim the franchise's second championship, and the Patriots would narrowly defeat the Eagles in Super Bowl 39 to become back-to-back champions.New England had to win some close playoff games during its back-to-back title run, including two tight Super Bowls, but the Patriots were 28-4 between the 2003 and '04 regular seasons.It took some time before another team even came close to back-to-back championships. No reigning Super Bowl winner reached a conference championship game until the Seahawks went to Super Bowl 49 a year after winning Super Bowl 48. Seattle was on the verge of repeating until Ru sell Wilson was intercepted by Malcolm Butler at the goal line to seal a Patriots win.The Patriots came up short in the AFC championship when they were two wins away from going back-to-back in 2016, and they came Jesus Luzardo Jersey close again two years later when they lost Super Bowl 52 to the Eagles in an upset.The Chiefs already had an opportunity to go back-to-back when they reached Super Bowl 55 after winning Super Bowl 54, but the game got away from them against a dominant Buccaneers defense. Now, Kansas City can complete the mi sion against a 49ers team with some unfinished busine s themselves.MORE SUPER BOWL 58: | Back-to-back Super Bowl winnersThere have been eight back-to-back Super Bowl winners. No team has ever won three consecutive titles. Team Seasons Super Bowls Packers 1966, 1967 1, 2 Dolphins 1972, 1973 7, 8 Steelers 1974, 1975 8, 9 Steelers 1978, 1979 13, 14 49ers 1988, 1989 23, 24 Cowboys 1992, 1993 27, 28 Broncos 1997, 1998 32, 33 Patriots 2003, 2004 38, 39Why is it so hard to win back-to-back Super Bowls?It's very difficult to be the last team standing out of 32 teams, simply from an odds standpoint, but the salary cap and player movement have contributed to a decline in back-to-back Super Bowl champions over the past few decades.Only two teams have won consecutive Super Bowls since the NFL implemented a salary cap in 1994. The cap makes it more difficult for teams to keep all of their stars, and it's increased parity around the league. That's why many teams see value in building a talented roster around a quarterback still on a cheap rookie contract, which is precisely what the 49ers have done. Mega deals for quarterbacks can put a limit on what teams are capable of adding elsewhere.MORE: The Chiefs had to navigate carefully through salary cap questions on their way to the doorstep of back-to-back championships. Financial concerns led Kansas City to trade WR Tyreek Hill before the 2022 season, and difficulty working out a new deal with DT Chris Jones led the Pro Bowler to sit out all of training camp and the first game of the season in '23.Those questions won't go away, either. Mahomes' cap hit is set to rise by $20 million in 2024, CB L'Jarius Sneed is a free agent and due a significant raise, and many of the Chiefs' key defensive players who have been the backbone of the team all season will inch closer to the end of their rookie deals.In some ways, the Chiefs have already defied the odds by getting to Super Bowl 58. A win in Las Vegas would be historic for Kansas City in more ways than one. Jake Burger Jersey