I'm not sure. They actually develop them!!!! How many U17 caps between McKenie, Pomykal, Roberts, Servania, Cerrillo, Ulloa, Cappis, and company!? Kellyn Acosta had a ton of U17 caps, but all as a fullback. Emerson Hyndman only had 3 U17 caps (but that one was predominantly due to availability.) Alejandro Zendejas had more U17 caps than all of those guys combined. Zendejas is probably the forgotten man in the group, for obvious reasons. But he's still at Chivas. Played 10 games this season. They're all just included when they become U20s. The next in this particular line will be Tanner Tessman. He's had a cup of coffee with USYNTs, but it won't surprise me if he zooms up the radar to USYNT discussion in the next two-three years.