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Story summary
- The Seattle Mariners acquired left-handed pitcher José Castillo from the New York Mets, designating Joe Jacques for assignment.
- Castillo, 29, has a 4.98 ERA this season but recorded a 2.35 ERA in 16 games with the Mets.
- The Mariners seek to improve playoff prospects, currently holding the American League's third wild card spot, 1.5 games ahead of the Texas Rangers.
