Here's a look at how each of those Series relates to the 2014 Fall Classic, as well as some other interesting Game 7 facts and figures below.
2001 World Series: Diamondbacks defeat Yankees
The Royals hope to follow the Diamondbacks' World Series blueprint from 13 years ago when the D-backs routed the Yankees in Game 6 before rallying for a walk-off victory in Game 7.
Like Kansas City, Arizona had returned home trailing 3-2, but jumped out to a huge lead early in Game 6. Arizona used an eight-run third inning to blow the game open en route to a 15-2 victory. The Royals, meanwhile, scored seven runs in the second inning on Tuesday on their way to a 10-0 win. The D-backs went on to defeat the Yankees, 3-2, in Game 7 on Luis Gonzalez's walk-off single against Mariano Rivera.
1985 World Series: Royals defeat Cardinals
As the Royals try to rally for their second World Series championship in franchise history, they need to look no further than their first title run for inspiration. Like this year, Kansas City returned home for Game 6, trailing the Cardinals, 3-2.
Though it wasn't in blowout fashion as it was on Tuesday, the Royals eked out a Game 6 victory and then routed the Cardinals, 11-0, in Game 7 to complete the Series comeback.
1979 World Series: Pirates defeat Orioles
The Giants will try to do on Wednesday night what no team has done since the 1979 Pirates -- win a Game 7 on the road. In each of the last nine do-or-die World Series games, the home team has emerged victorious.
Yet in '79, the Pirates went into Baltimore and won Games 6 and 7 to shock the Orioles. The Pirates had trailed, 3-1, in the Series before rattling off three straight victories, including the last two on the road.
1975 World Series: Reds defeat Red Sox
The Giants are hoping to bounce back in Game 7 after missing out on their first chance to close out the series in Game 6. It won't be an easy task, however, as the '75 Reds are the last team that lost Game 6 on the road and came back to win Game 7.
The Reds went into Fenway Park hoping to clinch in Game 6, but the Red Sox had other plans, as Carlton Fisk delivered a walk-off homer in the 12th inning to force a decisive seventh game. The Reds managed to quickly put the loss behind them, rallying from a 3-0 deficit the next day to win the game, and the series, 4-3.
Now, here's a look at some important Game 7 numbers:
• The home team has won each of the last nine World Series Game 7s, dating to 1982. Prior to the recent Game 7 success of home teams, however, the road team had won 13 of the last 16 do-or-die World Series contests. Overall, the home team is 18-17 in deciding Game 7s.
• This is the ninth World Series since 1982 in which a home team facing elimination has won Game 6 to force a winner-take-all Game 7. Each of the last eight went on to win the series. Overall, home teams that win Game 6 to force a Game 7 are 13-9 in the Fall Classic.
• At 39 years, 107 days, Time Hudson will be the oldest Game 7 starter ever. Roger Clemens was 39 years, 92 days old when he started for the Yankees against the D-backs in Game 7 in 2001.
• Since the introduction of the designated hitter, the American League has won five out of seven World Series Game 7s played in AL ballparks, including each of the last four. That list includes the 1985 Royals, who won Games 6 and 7 at home against the Cardinals for the franchise's only World Series title. The only NL teams to win road Game 7s in the DH era are the '79 Pirates against the Orioles and the '75 Reds against the Red Sox.
• The Giants are 0-4 all-time in sudden-death World Series games, including 0-3 in Game 7s. They lost Game 7s in 2002 against the Angels, 1962 against the Yankees and 1924 against the Washington Senators. They also lost a winner-take-all Game 8 against the Red Sox in the 1912 Fall Classic, after the teams played to a tie in Game 2 and needed an extra game to decide the series. The Royals' Game 7 victory in the '85 World Series, meanwhile, is their lone World Series Game 7 in franchise history.
• This is only the second time that both Wild Card winners reached the World Series -- and the first one also went seven games. The 2002 Giants lost Game 7 to the Angels in the only other World Series between Wild Card teams. Of course, that was before the second Wild Card was added.