Catcher Gregg Zaun filed for free agency on Monday, but there is still a chance that he could remain in a Toronto uniform in 2007. Zaun became the fourth Blue Jays player to file, joining Ted Lilly, Justin Speier and Frank Catalanotto -- all of whom filed for free agency on Saturday. The only player left to file is catcher Bengie Molina. Toronto general manager J.P. Ricciardi said earlier this month that the Jays would buy out Molina's contract for $500,000 instead of picking up his $7.5 million option for next year.