AP source: Former Reds OF Castellanos, Phillies agree to $100M, 5-year deal
Reds slugger Nick Castellanos reportedly opts out of deal
Nick Castellanos exercises opt-out clause in deal with Cincinnati Reds to become free agent - ESPN
Best MLB free agents 2021: Ranking the 20 best players this winter
Former Reds outfielder Nick Castellanos has a new suitor
Reds' Nick Castellanos' has bat inspected after 2 homers
Nick Castellanos on Silver Slugger Award, possible Reds reunion
Suspension of Nick Castellanos upheld because MLB discipline is a joke - Red Reporter
Cincinnati Reds still 'showing interest' in free agent slugger Nick Castellanos - Red Reporter
Free-agent market status 2021-2022
2022-23 Top 50 Free Agents With Predictions - MLB Trade Rumors
Watch: Nick Castellanos on the Reds, his suspension, his leadership - Redleg Nation
Former Reds outfielder Castellanos among those with $100M contracts not on All-Star teams
Free agency fits for every MLB team in 2021