Banks was 8-5 with a 2.97 ERA in 15 starts for the Express, 13 of which came with Castro behind the plate. Castro made his Major League debut Tuesday.
"He knows me pretty well as far as thinking-wise and gets a lot of different signs and that makes it a little bit easier," Banks said. "Whoever's catching, you still have to get on the same page and get as many outs as you can."
Castro started three consecutive games upon making his Major League debut before being out of the lineup Friday against the Rangers. Astros pitchers posted a 1.33 ERA in the three games Castro started behind the plate. Castro said having the ability to study video has been a help.
"I've done a lot, and really, for the first time in my career I have the resources and ability to scout the other team," Castro said. "We put a lot of work in with [pitching coach Brad Arnsberg] and have gone over some footage and talked about plans of attack with each hitter and things like that. It's been extremely beneficial and really helped me so far. I continue to put that to work and see similar results."