SAN FRANCISCO -- Reds manager Bryan Price won't have long to figure out how his roster is going to shape up after losing in 17 innings, 3-2, to the Giants in a five-hour, 28-minute marathon Friday night.
His leadoff man, Billy Hamilton, who had his eight-game hitting streak snapped with an 0-for-7 night, tweaked his calf late in the game and is uncertain for Saturday afternoon.
"I don't if it was a cramp or strain of the calf. That's something we'll kind of define here now that the game's over," Price said. "And we'll see. I don't know if we'll be able to write up the lineup until tomorrow."
Hamilton struck out with the bases loaded in the top of the 15th with the game knotted and looked hampered by the injury to his right leg. He stayed in the game and was immediately tested by a deep fly ball from Justin Ruggiano in the bottom of the inning.
He scampered back to the center-field wall to make the play, but looked like he was in considerable pain as he threw the ball back in. He stayed in the game while Cincinnati didn't have any position players left on the bench.
On the pitching front, Price used six of his eight relievers, leaving two fresh arms available when the two teams take the field again just over 12 hours after Buster Posey ended the night with a walk-off home run to give San Francisco the win.
"There's a lot of activity today," Price said. "We'll have to come back in a few hours and be back here and get everybody kind of warmed up again and see what they have in the tank."
The night started off looking promising for Price's bullpen with starter Scott Feldman going seven innings while allowing just two runs. But he was matched by Giants starter Johnny Cueto, who threw eight innings of two-run ball with six strikeouts.
The two pitchers that didn't throw were Raisel Iglesias and Barrett Astin. Iglesias got the save Thursday while Astin last pitched Monday against the Yankees when he allowed a pair of homers.
The Reds will hope to get a strong performance from Lisalverto Bonilla (0-0, 7.20 ERA), who's making his first Major League start since 2014. He compiled a 5.61 ERA in five starts this season for Triple-A Louisville and allowed four runs in five innings of relief during his only appearance with the Reds on April 22.
Chris Biderman is a contributor to MLB.com and covered the Reds on Friday. This story was not subject to the approval of Major League Baseball or its clubs.