FSV Mainz 05, commonly known as Mainz 05, was formed on March 16th, 1905 (source). The club was established by a group of local football enthusiasts from the city of Mainz - an affirmation of their passion for the beautiful game.
In its initial years, Mainz experienced modest beginnings like most clubs at that time. They had limited resources but were rich in determination and resilience - qualities which helped them grow steadily despite numerous adversities.
Among the early notable players for Mainz is Herbert Pohlmann who played with the team during the late forties to early fifties era (source).