A team spokesman later said trainer Kevin Rand had pronounced Fister fine. Leyland felt comfortable enough about Fister's prognosis that he joked a bit about flying back to Detroit with the pitcher.
"He was sitting right behind his folks and I had a nice conversation with him," Leyland said. "I'm a little worried about him because this morning he didn't remember our conversation no, I'm just kidding."
San Francisco finally scored in the seventh inning and went on to win 2-0 on Thursday night. The Giants lead the series by that same count.
Although Fister was unable to protect himself very well from Gregor Blanco's line drive, it may have dealt enough of a glancing blow that he avoided a major injury. The ball struck Fister just above the right ear and ricocheted into short center field for a single.
After picture-perfect conditions in San Francisco, the World Series moves to Detroit, where it was already a bit chilly on the field Friday afternoon.
High temperatures are expected to be in the low 50s this weekend, when Games 3 and 4 will be played at Comerica Park.
It could be even colder for Game 5 on Monday.
"Playing in cold weather, I don't think any baseball player is a stranger to it," Detroit catcher Alex Avila said.
Ryan Vogelsong, San Francisco's Game 3 starter, has a similar attitude.
"It's the World Series. You can't be worried about how cold it is," he said. "I threw a game in Chicago last year where it was 34 degrees, and it was raining and sleeting, and I threw the ball pretty well that night."
Panda's market power
Those panda hats that Giants fans wear to support third baseman Pablo Sandoval are very much in vogue during this World Series.
The Giants reported sales of 466 hats for Game 2, in the wake of Sandoval's three-homer performance in the series opener.
A total of 760 hats were sold for Games 1 and 2.