Oakland pitcher Justin Duchscherer may make his big league season debut Tuesday against the Yankees, according to Susan Slusser of the San Francisco Chronicle.  Duchscherer, 31, had arthroscopic elbow surgery on March 31st. Slusser says other teams have been scouting Duchscherer's rehab appearances, and the Tigers and Red Sox are among the teams expected to be represented tonight.  Whether these scouting missions fall outside of the teams' normal coverage and imply trade intere...