Complex sentence: The game moved to extra innings and in the twelfth the Mariners recaptured the lead once more with a homer by Griffey, but, in the bottom of the twelfth, the Yankees rallied.
Split into simpler sentences: The game moved to extra innings and in the twelfth the Mariners recaptured the lead once more with a homer by Griffey. But in the bottom of the twelfth, the Yankees rallied.