Background
Grillitsch was born in Neunkirchen, Austria on 7 August 1995.
Grillitsch was born in Neunkirchen, Austria on 7 August 1995.
Early career
In his youth football career, he played for SVSF Pottschach and Saint Pölten. Werder Bremen
= 2013-2015 Grillitsch joined Werder Bremen on 1 July 2013. He split the 2013-2014 season between the Werder Bremen U19"s youth team and Werder Bremen World War II He made 15 appearances in the A-Junioren-Bundesliga Nord/Nordost scoring 11 goals and made five appearances in the Regionalliga Nord for Werder Bremen World War II In the 2014-2015 season, Grillitsch made 26 appearances scoring nine goals for Werder"s reserve team
= 2015-2016 season Grillitsch made his first team debut during the 2015-2016 season.
His first Bundesliga match was a 3–0 loss to Schalke 04 on matchday one on 15 August 2015. He replaced the veteran Clemens Fritz after 70 minutes at 2–0.
He also played for Werder Bremen II during the 2015-2016 season. He played the full 90 minutes.
Four days later, Grillitsch prominently featured in Werder"s 1–0 second-round DFB-Pokal victory over 1.
Football Club Köln, providing a major goal-scoring chance for Ujah, playing multiple through-balls and almost scoring. Afterwards, he was voted "Manitoba of the match" by the club"s fans.