The Seattle Mariners had two scouts watching the Boston Red Sox’s Triple-A affiliate on Wednesday night and one watching the Sox’s Double-A club, according to major league sources.

The extent of trade discussions between the teams is not known, but several Mariners pitchers are drawing significant interest from multiple clubs. Right-hander Doug Fister, in particular, is a target of virtually every team seeking rotation help, sources said.

However, Boston's primary focus could be left-hander Erik Bedard, who has not pitched since June 27 because of a strained left knee but will come off the disabled list Friday night to pitch against the Tampa Bay Rays. The Sox are “all over” Bedard, one source said, and both the Sox and New York Yankees are expected to scout Bedard on Friday night.

Mariners closer Brandon League would be another possibility, though the Red Sox are loathe to give up prospects for relievers after their experience with Eric Gagne in 2007. Mariners president Chuck Armstrong told FOXSports.com earlier this week that it’s unlikely League will be traded.

— Ken Rosenthal and Jon Paul Morosi