In 1919, the team starred George Halas at wide receiver; Halas left for the Decatur Staleys – the future Chicago Bears – the next year and remained with that franchise as a player, coach and owner until his death in 1983. The Hammond Pros played most of its games in Chicago's Cub Park, which is now known as Wrigley Field. Despite the name, the Pros were never really more than a semi-pro team. Most of the players were locals who had full-time jobs and couldn't practice much, so Hammond was simply no match for most other NFL teams. It also didn't help that the Pros played most of their games on the road because Hammond lacked a field with any kind of seating capacity. Nevertheless, Young kept the team going in the NFL for seven years, during which they held a combined record of 5 wins, 26 losses, and 4 ties. They managed to reach .500 only once, with a 2-2-record in 1924. Young might have kept it going even longer, but after winning the 1926 battle with the American Football League, the NFL decided to scale down to 12 teams, getting rid of many of the smaller franchises, including the Pros.
Of the nine African-American players in the league during those years, six played for the Pros, including the first African-American head coach in the NFL, Fritz Pollard.