'It's always a great feeling to win,' said Hatalsky, who takes home $225,000 for the victory.
Bruce Fleisher fired an 8-under 62 to finish two shots off the lead at 10-under-par 200. Fleisher was joined by Dana Quigley, Des Smyth and Doug Tewell in a tie for third.
Hatalsky began the day tied for the lead with Jim Thorpe at Green Island Country Club and hit a sand-wedge to 17 feet for a birdie at the par-4 fourth. He got up and down for par at the fifth and drained a long birdie putt at the par-3 seventh to make the turn at 11-under.
'I wasn't as sharp on the front nine as I was the first two days but my short game saved me,' said Hatalsky.
At the par-4 10th, Hatalsky's approach stopped 12 feet from the hole and the 51-year-old converted for his third birdie of the day.
Hatalsky then parred the next eight holes to complete the tournament without a bogey.
'I was focused on each and every shot today,' said Hatalsky, who has now played his last 79 holes bogey-free. 'I'm pleased to finish on top despite not playing as well as I did the first two days.'
Hatalsky is the 13th different winner on the Champions Tour in 13 events this season.
Doyle was one shot back of Hatalsky and Thorpe to start the final round and tallied two birdies on the front nine to jump to minus-10.
He hit a sand-wedge to 12 feet for a birdie at the 13th and had a putt from the same distance at the par-5 18th that would have forced the playoff. Doyle missed the birdie try, however.
'When I executed today I just didn't get the results I thought I would,' said Doyle. 'I just need to read the greens a little bit better.'
Larry Nelson posted a final-round 63 to finish alongside Hubert Green and Dave Barr at 9-under-par 201. Stewart Ginn and Tom Jenkins followed at 8-under-par 202.
Tom Kite, John Bland, Jim Holtgrieve and Jim Ahern were one shot further back at 7-under-par 203.
Ed Dougherty, who held a share of the lead after the opening round, was joined by Jim Dent and Walter Hall at 6-under-par 204.