Union Professional League

The league was founded by businessman Alfred Lawson (1869–1954), who had briefly pitched for the Boston Beaneaters and the Pittsburgh Alleghenies in the National League (founded 1876) in 1890; he would later become known for his philosophy known as Lawsonomy and for his success in the aviation business.

[1] Lawson decided to run the new league without utilizing a salary cap, multi-year contracts or a reserve clause.

Biographer Jerry Kuntz wrote that sportswriters "dubbed the effort the 'Onion League,' because it was cheap and smelled bad.

"[2] Play opened in late April 1908, and the league ran into problems almost immediately.

The Washington club, for example, experienced nine rainouts in May, with six of them occurring in a nine-day stretch.