Keep your eyes on the players participating for the Boston Red Sox and Oakland Athletics in this week's exhibitions and regular-season American League games at Tokyo Dome. Someone from those rosters will come back to play for a Japanese team, and you can take that to the bank.

It may not be David Ortiz or Manny Ramirez, but somebody getting a taste of baseball in Japan will return to work for a club in the Central or Pacific League.

How do I know?