Baseball Labor History
http://xroads.virginia.edu/~CLASS/am483_97/projects/brady/labor.html
Excellent history of the reserve clause. Specifically discusses the role of John Montgomery Ward and the Brotherhood of Baseball Players. Contains pictures of Ward and other baseball union leaders. Also links you to other excellent pages on Curt Flood and more recent baseball union leaders.
Referenced in:
Show Me the Money: Labor/Management Issues in Professional Baseball