Geary, on the disabled list since May 14 with biceps tendinitis, threw between 40 and 50 pitches prior to the Astros' game against the Rockies and reported no ill effects. He will pitch for Corpus Christi on Saturday and Monday in Springfield, Mo.
If all goes well, Geary could be ready to rejoin the Astros in time for the next road trip, which begins June 12 in Arizona.
"Every day has been a progressive movement," Geary said. "The timing is still a little bit off, and that's why I'm going and throwing against hitters. Maybe it will keep me away from trying to figure it out mechanically and just throw and do it.
"A lot of times we try to dig too deep and solve problems, when a lot of the problems have already been solved and you've just got to do it."
Geary is scheduled to throw an amount of pitches equal to about two innings of work Saturday and will likely throw only one inning Monday, though he could finish getting his work done in the bullpen.
Not only is Geary curious about his performance, but he wants to make sure he continues the tradition of big league players doing something special for the Minor Leaguers while on rehab assignment.
"I can't remember the last time I did a rehab assignment on the road," he said. "I've been to a home team and did it, but never to a visiting team. Some of the guys had said you don't necessarily want to help out the visiting clubhouse guy. I could buy food for the bus or talk a group of them into going out for dinner and lunch, and I'm definitely going to pay."
Brian McTaggart is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.