The latest news from Minnesota United
A Roland Lamah header helped Dallas overcome Minnesota United 1-0 in MLS.
"I'll be announcing for the first time publicly that I am an openly gay player in Major League Soccer," Martin wrote on Twitter.
Daniel Salloi, Wan Kuzain, Cristian Lobato and Diego Rubio helped extend Sporting Kansas City's unbeaten streak in MLS on Sunday.
Atlanta United's eight-match unbeaten run was ended by Sporting Kansas City, while Toronto were bested by Seattle Sounders.
The New York Red Bulls were too good for Minnesota United thanks to a Bradley Wright-Phillips brace.
Minnesota United's poor start to the MLS season continued as Columbus Crew enjoyed an entertaining win.
Josef Martinez netted a hat-trick and Miguel Almiron scored twice as Atlanta won the battle of the expansion franchises amid heavy snowfall.
Diego Valeri and Fanendo Adi scored twice as Portland Timbers defeated MLS expansion franchise Minnesota United.