FRISCO, Texas - Keegan Rosenberry will long remember his professional soccer debut.
He'd probably like to forget it.
The Union defender and No. 3 overall choice in the 2016 MLS draft was helpless against the speed of FC Dallas' attack in his team's season-opening 2-0 loss Sunday at Toyota Stadium, finding himself a step behind - often more than one - throughout the afternoon.
Not that he was alone. The Union defense, which also included newcomers Anderson Conceicao and Ken Tribbett, was outrun and thoroughly outplayed by Dallas' swift attackers Fabian Castillo, Michael Barrios and Mauro Diaz as the Union allowed 18 Dallas shots, 10 of them on goal.