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Mariners make 1B/OF Corey Hart signing official; DFA OF Travis Witherspoon

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Corey Hart is a Mariner, my friends, and it's a wonderful day to be alive: 

The one-year deal is worth a reported $6 million, but could reach $13 million with incentives.

Seattle will introduce Hart at a press conference on Friday afternoon. Jay Z will probably not be at this one. 

The Mariners designated Travis Witherspoon for assignment to make room for Hart on the 40-man roster. Witherspoon, 24, was claimed by the Mariners off waivers from the Angels in October. He had a disappointing .641 OPS in 129 games at Double-A in 2013. 

For more details -- on Hart's injury troubles and his numbers -- check out the storyline below. 

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