Thanks! The Oregon game shown above was part of a 1909 tournament in a place called Prairie City, as iconic a name for an old west town as you'll find. Below are the five I have from the tourney. $300 was awarded for first place, $200 for second, $100 for third.
The c. 1911 Portland Giants (above) is the same team that Jimmy Claxton played for a few years later. The team with Claxton is shown below (he's in the bottom right). Some of the c. 1911 players are identified here:
http://www.sportingoregon.com/p75660...5ea5#h52845ea5 . Any additional information on players is welcome.
The Gophers image above was snapped in 1908 when they were the St. Paul Gophers, as confirmed by the uniforms and players shown.