With the help of John Thorn and his friends (portions of their text is pasted below), all three of these photos now have more info!
The single player appears to be S. (or T. based on a newspaper article) Smith, the first African American player in Quebec history. He played for Montreal in 1899 and for St Jean in 1900. Here are his stats (clicking on the teams gives you the team stats):
http://web.archive.org/web/201007131...-smithnoir.htm
There is even a short newspaper excerpt about him from 1899:
SABR Page Talking about Smith - large.jpg
http://web.archive.org/web/201106300..._1899smith.htm
The composite photo of St. Hyacinthe is from 1902 when they won the pennant but lost the playoffs to the Montreal Mascottes two games to none. St. Hyacinthe would go on to win the playoffs the following year.
The players in the field have GABBC on their uniforms. It stands for Granite Association Base Ball Club. The Granite Mills used to sponsor the club from 1894 until 1897. The club was fittingly called the Saint-Hyacinthe Granites during those years. Here is an 1896 team photo with those same uniforms on:
Granite Mills photo -- same as the two in the field.jpg
I'd like to say thank you again to everyone who helped id these guys!