The Texas Derby trophy will remain in Houston for another year after a unique ending that came two months after the series' final game of 2017.
The Dynamo, who won back El Capitan last year, and FC Dallas tied all three regular season meetings. That put in motion a series of tiebreakers.
Because they tied all three games, the first tiebreaker of goals scored was not enough to determine the winner.
The third and fourth tiebreakers are games played between them in the CONCACAF Champions League and U.S. Open Cup. The Dynamo and FC Dallas did not meet in either competition.