Fox outlets will carry all 52 matches of the tournament in Canada, which begins June 6.
"You can never have enough attacking pieces," GM Dave Kasper says of newly acquired Argentine player.
Fabian Espindola and Nick DeLeon are also ailing ahead of a grueling stretch of MLS matches.
Arsenal prospect plays 31 minutes against Australia in tune-up for Under-20 World Cup.
Facundo Coria, who turns 28 this month, joins his ninth club.
Abby Wambach and Sydney Leroux scored two goals apiece as the Americans continued preparations for the World Cup next month.
MLS's Eastern Conference leaders seek to extend their unbeaten streak to nine with a visit to PPL Park in Chester.
Aron Johannsson remained in fine form in the Dutch Eredivisie, scoring twice and assisting for Europa League bound AZ Alkmaar.
It took less than 3 minutes to best the previous mark, held by Liverpool's Robbie Fowler, which stood for 21 years.
His son, Phillip, coaches Howard University. Grandson is with Borussia Dortmund. Granddaughter is on the U.S. under-18 national team.