Eight other players finished Wednesday's play at 4-under 68 and nine more are 3-under.
Carlsson had birdies on two of his first three holes but really took off beginning at the par-3 seventh hole. A birdie there started a spurt in which Carlsson had five birdies in a six-hole span. He added a birdie at the 16th before the closing bogey.
Bland had a bogey, two birdies and a double bogey in his first four holes but was bogey free the rest of the way en route to his 67 while Ignacio had a pair of bogeys against seven birdies. Baldwin and Hanson each had six birdies and a bogey Wednesday.