He said no cause or suspects had been determined for the blazes, which were about a mile apart.
A motorist noticed the smaller blaze, which covered 25 acres, near Piney Hollow Road and called 911 around 7 a.m., Drake said.
A state fire official reported the second blaze - which stretched across 375 acres between Winslow Road and the expressway - from a fire tower near the wildlife management area around 8:20 a.m., Drake said.
"They were burning for some time overnight," he said.
By 2 p.m., the smaller blaze was contained, Drake said.
The other was 75 percent contained by around 4:30 p.m., and firefighters set backfires close to the expressway to further rein it in.
Larry Ragonese, spokesman for the state Department of Environmental Protection, said firefighters expected to have the blaze contained by evening. Drake said crews would work into the night to put out hot spots.
On Friday, more than 40 Forest Fire Service personnel backed by two helicopters battled the fires, Ragonese said.
Winds from the north kept smoke mostly away from the expressway.
The two fires coincided with a red-flag warning from the National Weather Service for much of the region because conditions - winds, low humidity, and dry ground cover - were ripe for fires.
Ragonese said forestry workers already were preparing for wildfire season with controlled burns to thin out the ground cover that helps fires spread.
He said residents were urged to be cautious with outdoor fires and disposing of cigarettes.
The worst wildfire in state history burned 190,000 acres in the Pinelands in April 1963, destroying 185 homes and killing seven people. In 2007, 17,000 acres were burned after a National Guard pilot on a training mission dropped a flare into the Pinelands.
Contact Darran Simon at 856-779-3829 or email@example.com, or follow @darransimon on Twitter.