His debut in the Oberliga Süd led the former amateur on 22 August 1954 to the local Mainderby at Bieberer Berg in Offenbach.
The Frank had a heavy knee injury and could only play one match in his second Eintracht season in 1955–56 and even in the 1956–57 campaign he had to fight for his comeback.
On 28 June 1959, Loy and his team mates won the German championship 5–3 after overtime against Kickers Offenbach in Berlin.
The final match on 18 May at Hampden Park against the title holder Real Madrid was a football festival, despite the 7–3 loss.
Alfredo Di Stefano und Ferenc Puskás showed why they were considered as the biggest stars of the competition.
From 1965–66 on the former amateur national goal keeper Peter Kunter who came from Eintracht Wetzlar became number one of the Eagles.