Next Sunday, John and Jim Harbaugh will go toe to toe for Super Bowl XLVII and dinner table bragging rights.
While the Harbaughs will be the first brothers to face off against each other in a Super Bowl, they are far from the first set of family members to play for a championship.
We are all familiar with sibling rivalries, but having two brothers trying to scheme against and, ultimately, destroy one another always makes for an entertaining spectacle.
Then there are times when they work together and bring a level of companionship that being a mere teammate could never match.
Sometimes they stand next to each other, sometimes they glare in hatred until the final whistle, but whenever family is present on the field, it brings a whole new level of intensity.
So, in no particular order, here is a list of other brothers who have played for sports supremacy.
In 1920, the Johnson brothers became the first brothers to play for a professional sports championship in North America when they met in the World Series.
Wheeler "Doc" Johnson and his Cleveland Indians would beat Jimmy Johnson and the Brooklyn Robins in the best of nine series, five games to two.
Incidentally, this World Series would also have the first grand slam home run and the only unassisted triple play ever turned in a World Series, both of which came during the fifth game.
Rob Niedermayer (white) and his older brother Scott look on during game 3 of the 2003 Stanley Cup Final
One of the lasting images from the 2003 Stanley Cup Final was Carol Niedermayer sitting stone faced in the stands while her sons battled for hockey supremacy.
Older brother Scott and the New Jersey Devils would defeat Rob's Anaheim Mighty Ducks in a phenomenal seven-game series in which the home team won every game.
In the deciding seventh game, Scott Niedermayer assisted on the first two Devils goals in a 3-0 win, securing his third Stanley Cup championship.
Four years later, the brothers would team up to beat the Ottawa Senators in five games and win Anaheim its first Stanley Cup. The win would be Rob's first and only Cup, while Scott took home his fourth ring.
Guess which one is which
Henrik and Daniel Sedin take the term "identical twins" to a whole new level.
The Swedish stars of the Vancouver Canucks even go so far as to test out new equipment or grow facial hair at the exact same time.
They were integral in leading Vancouver to the 2011 Stanley Cup Final, where they came up one game short, losing the best-of-seven series 4-3 to the Boston Bruins.
It was probably for the best, as photographers would have had nightmares about trying to figure out which brother was which in the postgame celebration photos.
In 1985, Family Feud was popular both on daytime TV and in Super Bowl XIX.
Lyle (pictured above) and Glenn Blackwood, both safeties for the Miami Dolphins, faced off against Keith Fahnhorst, an offensive lineman, and his brother Jim, who played linebacker for the San Francisco 49ers.
While this was not the first time brothers had played in the same Super Bowl, it was the first time two sets of brothers would suit up against each other.
The Blackwoods, who had lost to the Washington Redskins in the Super Bowl two years earlier, came up short again, falling 38-16 to the Fahnhorsts.
The Puerto Rican catching trio are the owners of no less than six World Series rings.
But it was the family's first championship, won by the Anaheim Angels in 2002, that oldest brother Bengie and his younger brother Jose would share.
The Angels defeated the San Francisco Giants in seven games, marking the first time brothers had shared a championship while playing the same position.
The youngest brother, Yadier, had to wait four years before he won his first ring with the St. Louis Cardinals in 2006.
The Sutter family from Viking, Alberta, would send six sons to the NHL.
Collectively, Brent, Brian, Darryl, Duane, Rich and Ron played over 5,000 games and won six Stanley Cups as players.
From 1976 through 2001, at least one Sutter was playing in the NHL.
But in 1982 and 1983, Brent and Duane would team up to lead the New York Islanders to consecutive Stanley Cups, making them the first brotherly duo to win consecutive championships.
Despite all their success, all six brothers maintain that the seventh brother, Gary, was the best hockey player in the family. Rather than pursuing a hockey career, he chose to look after the family farm in central Alberta.