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Cincinnati Reds begin pivotal series against old friends the Seattle Mariners - Red Reporter
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Reds trade Castillo to Mariners for 4 prospects
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Seattle Mariners trade for Luis Castillo
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Seattle Mariners acquire Luis Castillo in trade with Cincinnati Reds
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All-Star pitcher Luis Castillo will begin tenure with Seattle Mariners against New York Yankees - ESPN
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Luis Castillo traded by Reds to Mariners ahead of MLB trade deadline
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Reports: Reds trade Luis Castillo to Mariners for four prospects
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The Seattle Mariners trade for Luis Castillo, make bid for postseason - Lookout Landing
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Luis Castillo 'ready to go' for first start with the Mariners
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10 MLB teams that should trade for Cincinnati Reds ace Luis Castillo
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Luis Castillo to make Mariners debut against Yankees