Houston Astros: Catcher Jason Castro announces retirement
Oops! All Astros: Jason Castro - The Crawfish Boxes
Astros roster by position
MLB offseason tracker: Blue Jays add Chad Green to bullpen National News - Bally Sports
Jason Castro has Become an Excellent Option Off the Bench - The Crawfish Boxes
Forget offense, Astros' Castro a savior behind the plate
Bowden: Ranking the top 35 free agents, and predicting their contracts and best fits - The Athletic
Astros Sign Jason Castro - MLB Trade Rumors
AL West offseason roundup: Every move by all 5 teams entering 2021 - Athletics Nation
Burning desire to win
No extension talks yet between Astros, Jason Castro - MLB Daily Dish