Q: Who will be the Giants' opening game starter? A: Tim Lincecum. There, that was easy. But it's a little bit tricky. The honor traditionally goes tothe ace of the staff, which would be Lincecum, who started the pasttwo openers. But Matt Cain is the Giants' second ace, and he didn'tgive up an earned run in the entire postseason, 21 1/3 innings.Doesn't that rate him a spring shot at winning the job?