Fabian Johnson is nursing a groin injury, which kept him out of Borussia Monchengladbach's final four Bundesliga matches. Meanwhile, Geoff Cameron tweaked his hamstring in the final Premier League match of the season for Stoke City.
Both USMNT veterans were limited in practice on Wednesday. With Sunday's friendly in Puerto Rico acting as an experimental match, it wouldn't be the craziest of plans to let both players sit out and rest.
Johnson has enjoyed one of the best seasons of his club career, scoring eight times and recording five assists in all competitions for Monchengladbach. Jurgen Klinsmann will be relying heavily on the versatile German-American this summer, assuming he can get back to full fitness.
It's been a steady season for Cameron at Stoke who has seen his place in the lineup shift regularly from right back to center back to even the holding midfielder spot from time-to-time. Whether it's on the back line or in the midfield, he'll be a big part of the USMNT's run this summer as well.