Chirinos has been working with Rangers first-base coach Bengie Molina, a former catcher, on his craft.
"You see a transformation in him becoming a pretty good catcher," Rangers manager Ron Washington said. "He's got a quick release. I'm surprised at the strength. But then I never had a chance to see it. So maybe it was there, I just never had a chance to see it."
Christian Corona is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.