Jason Castro turned down extension offer from Astros before 2014
Wrigleyville - Baseball Prospectus
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2022 Cal Poly Baseball Team Information Guide by Cal Poly
How the Houston Astros Revolutionized Player Development - The Ringer
Jason Castro (@J_Castro15) / X
Forever Astro Jason Castro Shuts Up Red Sox Nation, Pushing
Ex-Stanford catcher Castro says his Astros are progressing