He joined Wormatia Worms in March: Ab sofort ist Offensivspieler Lionel Gitau für den VfR Wormatia spielberechtigt. Der gerade 18 Jahre alt gewordene zweifache U17-Nationalspieler bleibt bis Saisonende. https://www.wormatia.de/lionel-gitau-verstaerkt-die-offensive/ He's an '08 who was with Houston: https://www.houstondynamofc.com/players/lionel-gitau/ USYNT experience: https://www.ussoccer.com/stories/20...-combined-domestic-training-camp-mesa-arizona This is the same club his older brother Andre spent time at before joining Mainz. https://www.bigsoccer.com/threads/andre-gitau-german-opportunity.2124596/
It looks like he already has some first-team appearances to his name. https://www.transfermarkt.us/lionel-gitau/profil/spieler/1094178 https://www.wormatia.de/archiv/spieler-datenbank/spieler-steckbrief/?spielerid=1642 I think this means there were (at least) four Yanks on the first team to end the season.