Roy Halladay and Tim Lincecum have combined to win four Cy Young awards, but only one has pitched like an ace so far this season.
Halladay looks to continue his solid start while Lincecum hopes to bounce back from a pair of rough outings as the Philadelphia Phillies visit the San Francisco Giants in the opener of a three-game set Monday night.
The right-handers have faced each other twice, with Lincecum winning Game 1 and Halladay taking Game 5 of the 2010 NL championship series.
Halladay's win marked his only victory against the Giants, improving to 1-3 with a 5.97 ERA in five career starts.
Lincecum won both of his outings against the Phillies in 2011 and is 5-2 with a 2.71 ERA in 12 games versus Philadelphia including the postseason.
Halladay (2-0, 0.60 ERA), who won a Cy Young with Toronto in 2003 and another with the Phillies in 2010 after Lincecum won the previous two NL awards, is coming off consecutive stellar outings.
He beat Pittsburgh 1-0 on April 5 after allowing t...