It’s Heineken Rivalry Week in Major League Soccer, and the Dynamo are squaring off against the hated Chicago Fire in the Third Coast Derby this Saturday (4 p.m. CT; ROOT SPORTS).

What’s that? Not familiar with the Third Coast Derby, or its illustrious prize, the Calen Carr Cup? Typically derbies are determined by their geographic proximity. In this case, however, the derby is predicated not on shared physical space, but a shared name. Both the Gulf Coast (Houston) and the Great Lakes region (Chicago) lay claim to the title of the “Third Coast,” thus we have a derby. The derby was formalized with the Calen Carr Cup after the former Chicago Fire forward was traded to the Dynamo in March 2011.

The trophy (right), modeled after Carr’s iconic helmet, went to Chicago in 2012 after they took the season series but went to Houston for the next three years after a series win in 2013 and various tiebreakers in ’14 and ’15. The Dynamo hold an all-time lead in the rivalry (8-5-8 record), but the series has been dead even since Carr’s trade. Both teams have notched two regular season wins and tied seven times, though the Dynamo recorded a win over the Fire in the knockout round of the 2012 MLS Cup Playoffs.

If you haven’t heard of the Third Coast Derby, here’s some other Dynamo rivalries you may be interested in: