(AP) -- Matt Cain isn't entirely to blame for his winless start.

While the right-hander looks to avoid losing four straight outings for the first time in seven seasons Wednesday, he also must try to keep the San Francisco Giants from being swept in a road series of at least three games by the Colorado Rockies for the first time in 12 years.

Though Cain (0-3, 2.88 ERA) is off to the worst start of his 10-year career in terms of record, he's yielded two or fewer earned runs in three of his four starts - all San Francisco losses. He's surrendered one earned run total while giving up four hits and striking out eight in seven innings during each of the last two.