The Major League Soccer and National Women's Soccer League squads worked on the Houston Police Officer's Memorial at Buffalo Bayou Park on Wednesday.
The park was devastated by flooding from Hurricane Harvey last August.
The players added fresh mulch and flowers at the park.
According to the players, the service was a way of supporting the community and the police officers of the city.
The act is part of a larger initiative by MLS under its MLS WORKS Greener Goals Week. The Dynamo will team up Friday with the Houston Zoo to plant a pollinator garden at the team's home at BBVA Compass Stadium.