Graeme McDowell is 11 shots behind leader Justin Thomas at the Workday Charity Open after shooting a third round of 70.
The Northern Irishman is five under par after making four early birdies before slowing on the back nine.
It leaves McDowell, back in action after a self-imposed two-week lay-off, tied for 29th at Muirfield Village.
Open winner Shane Lowry is joint 54th on one under after a two-over-par third round.
McDowell opted to withdraw from the Travelers Championship and sat out last week's Rocket Mortgage Classic after his caddie Ken Comboy tested positive for Covid-19.
Prior to that he missed the cut at both the Charles Schwab Colonial Event and the RBC Heritage as the PGA Tour returned to action in June.
McDowell began the third round tied for 29th place having struggled to find consistency on his way to a second-round 73.
However having done enough to make his first cut since the resumption of the PGA Tour, the 2010 US Open champion impressed on Saturday with four birdies on the front nine.
A bogey at the fourth saw McDowell reach the turn in 33 but still seven shots behind overnight leader Morikawa.
The back nine proved tougher for the 40-year-old, whose bogey at the 12th brought him back to two under for the round.