From your textbook:

• The Federal Baseball Decision:  Text of the decision by Justice Holmes.
• Player Movement:  Tom Ruane's analysis, mentioned in your textbook.
• Lack of Loyalty in Sports Doesn't Take Sides (MSWord):  Larry Weisman at USAToday on the topic in your text.

History of Player Pay Links, Current Topics:

• Puerto Rico Wants Out of the Draft.  At MLB.com.
• MLB First-Year Draft Index:  Nearly everything you want to know about the MLB draft. Just click for recent and history back to 1965.
• NFL Draft History:  From Jay Berwanger, 1936, to your favorite from last year.
• The Jean-Marc Bosman Decision :  Complete background and analysis of the "Belgian Curt Flood" whose court case introduced free agency into European football.

Don't forget that all of the salary and payroll data are at the Sports Business Data Pages!