1998 U.S. Open Cup
The 1998 U.S. Open Cup ran from June through October, 1998, open to all soccer teams in the United States.
The first-year Major League Soccer club Chicago Fire won the Cup with a 2–1 overtime victory over the Columbus Crew at Soldier Field in Chicago, Illinois.
In the early rounds of the tournament, only one MLS team lost to a minor-league side, when the A-League's Nashville Metros beat the Kansas City Wizards 3–1.
Open Cup Bracket
''Home teams listed on top of bracket''First round
Eight D3 Pro, four PDL, and four USASA teams start.Second round
Eight A-League enter.Third round
Eight MLS enter.Quarterfinals
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Semifinals
----Top scorers
| Position | Player | Club | Goals |
| 1 | Jason Acres | Chicago Stingers | 4 |
| 2 | Kirk Wilson | El Paso Patriots | 3 |
| Brian McBride | Columbus Crew | 3 | |
| Joe Carver | Chicago Stingers | 3 | |
| James Wellington | Charlotte Eagles | 3 |