Breaking attendance records has become the norm for the Seattle Sounders. And after failing to set a new mark last year for the first time in their MLS history, the Sounders are poised to set the bar once again as more than 53,000 are expected to be in attendance for Sunday's regular-season finale against Real Salt Lake.

That would bring 2015's average attendance to more than 44,100, just a smidge better than the 44,038 that set the record in 2013. The Sounders "only" drew 43,734 last year, which still counts as the second highest average in league history. This will also be the third-highest average in North American soccer history, still falling behind the average attendance figures posted by the New York Cosmos in 1978 (47,856) and 1979 (46,690).

Only Mexico's Monterrey (45,141) will outdraw them in North or South America and only 26 clubs around the world will average more fans per home game this year.

This will also mark the 16th time in the last five seasons that the Sounders will have drawn more than 50,000 to a regular-season match. The Sounders have gone 11-2-2 with a +17 goal-difference in the previous 15 matches in front of crowds that size.

If the Sounders can draw at least 53,250 fans to the match, they'll surpass 750,000 fans for the MLS regular-season. As a point of comparison, the Seattle Seahawks usually draw about 550,000 fans over eight home dates to CenturyLink Field.