After making four competitive appearances for Bayern, scoring once and having a loan at Hamburger SV, he moved to VfB Stuttgart in January 2017, winning the 2.

[3] Green made his professional debut on November 27, 2013, coming on in the 88th minute of a UEFA Champions League game against CSKA Moscow as a substitute for Mario Götze.

[14] Green started a Champions League match for Bayern Munich against Dinamo Zagreb in December, playing 62 minutes.

[16] Following an international break in which Green scored two goals in two successive matches,[17] Ancelotti hinted that the player could be receiving a "chance to play in the next few games".

[19] To that point in the season, despite being regularly named to the squad for Bundesliga matches, Green had only made a substitute appearance in the Pokal, against first round opponent Carl Zeiss Jena.

[25] Green stayed with Greuther Fürth following the expiry of his loan, signing permanently for the club on June 17, 2018, inking a two-year contract.

[26] On August 12, 2023, in a first round match in the 2023–24 DFB-Pokal, Green was racially abused while playing against Hallescher FC in Halle, Germany.

Explaining his decision to play for the United States, Green said, "I was born in Florida and my father still lives there, so I have deep roots in the U.S.

"[35] On March 24, FIFA approved Green's change of association, making him eligible to play in games for the United States.

[36] Two days later, he received his first call up for the senior national team for a friendly in April against Mexico,[37] and made his debut in the second half of the 2–2 draw at the University of Phoenix Stadium.

[38] Green was selected as a part of the United States men's national team on May 12, 2014, to train for the 2014 FIFA World Cup in Brazil.