They are at 11-under 129 in the PGA Tours last event before the playoffs.
The third round was scheduled to begin later Saturday. Round 2 was halted Friday night due to darkness with 28 players left on the course as Tour officials played catch-up after a four-hour weather delay Thursday.
Maggert birdied the par-4 No. 18, hitting his approach shot 13 feet from the flagstick and rolling in the putt.
A total of 87 players made the cut of 2-under.