It's a set piece, it's a header, it's a goal, It's Chad Marshall.  The Brothers talk about the unassuming defender that played exclusively in MLS and finished with the best career for a defender in MLS history, including the most Defender of the Year awards by a player ever.

Sources: 

Extratime Bobby Warshaw on the Chad Marshall Theorem

https://www.mlssoccer.com/post/2018/11/07/wiebe-must-win-seattle-sans-chad-marshall-four-reasons-be-worried

Productivity, Longevity and Nudity by Sam Staejkal

https://www.mlssoccer.com/post/2018/10/27/stejskal-chad-marshall-dishes-his-productivity-longevity-and-nudity

Berhalter trades Marshall Financially motivated

https://www.mlssoccer.com/post/2013/12/13/columbus-crew-head-coach-gregg-berhalter-says-chad-marshall-trade-was-financially

Tom Bogert and the transition of Seattle & Marshall:  https://www.mlssoccer.com/post/2019/11/08/inside-how-seattle-sounders-transitioned-through-chad-marshalls-retirement