(CBS) The Chicago Cubs have exercised an option in their contract with WGN-TV that will end the agreement following the 2014 season.

The team reportedly notified the Tribune Co.-owned station on Tuesday that it had 30 days to meet a higher assessed fair market value for the broadcast rights.

After the 30 days, the team would then be free to explore other broadcast options for the roughly 70 games televised each season by WGN.

The Cubs relationship dates back to 1948.

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A Cubs spokesman reportedly declined to comment.

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