Report: Nolan Arenado to retain contract, not opt out
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Done deal: Arenado traded from Rockies to Cardinals for five
St. Louis Cardinals' Nolan Arenado, Genesis Cabrera get
Cardinals' Nolan Arenado sets the record straight on his decision
Arenado Opts In
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Nolan Arenado makes big decision on his contract
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Reviewing the Nolan Arenado Prospect Package - Viva El Birdos
There's a reason why I opted in': Nolan Arenado wants a hand in