Gorzelanny will have the finger examined by a specialist when the team returns to Pittsburgh on Friday.
He left trailing, 2-0, after having thrown 52 pitches -- 31 for strikes. The lefty issued two walks, allowed three hits and struck out two. T.J. Beam relieved Gorzelanny and got out of the third-inning jam with no damage done by Houston.
Concerning this latest injury, Gorzelanny will not know whether his season ended with a pitch to Lance Berkman in the third until the team returns to Pittsburgh on Friday and he sees a specialist.
"I threw a pitch and I just kind of felt a pop in my finger," Gorzelanny said. "It felt kind of funny. It swelled up a little bit. It's really sore."
While the severity and the cause of the injury are unknown, it could stem from a slight ailment that Gorzelanny took into the game. The left-hander admitted to jamming the same finger a few days back -- how he did so, he doesn't know -- which could have contributed to the sudden pop he felt.
Wednesday marked Gorzelanny's fourth start since returning from a seven-start stint in the Minors. The left-hander was 0-2 with a 7.04 ERA in those past three starts.
Jenifer Langosch is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.