That the final Edmonton goal came off the stick of the Ducks' Corey Perry — whose centering pass from behind the Oilers net glided untouched, the full length of the ice, into an open net with 15.4 seconds remaining — merely added to their frustration.
The real teeth-gnashing came over the fact that the Ducks, playing without star forward Teemu Selanne, who was scratched because of a groin injury, lost despite dominating for long stretches and outshooting the Oilers, 40-25.
That left them feeling much as they did Friday night, when they lost to Columbus despite outshooting the Blue Jackets, 50-29.
"Getting 40 shots isn't relevant if you're just taking shots from the boards and the blue line," Ducks captain Ryan Getzlaf said. "We're getting off shots, but we're not driving inside. You have to get to the net and create havoc."
Sunday's loss completed a grueling stretch in which the Ducks played 11 games in 19 days, and they will rest for two days before returning to practice Wednesday.
"Hopefully we'll freshen ourselves up," Ducks Coach Randy Carlyle said. "It's been a tough grind, but there's probably been too much talk about how tough it's been."
The Oilers, who entered with a Western Conference-worst 4-10-4 record, snapped a 2-2 tie when Ales Hemsky took a pass down the right side from Dustin Penner, shielded defenseman Toni Lydman with his body and snapped a wrist shot past goaltender Jonas Hiller's stick side 13 minutes 29 seconds into the third period.
After a scoreless first period, both teams struck quickly in the second, Edmonton scoring twice in a span of 1:41 and the Ducks countering with two goals within 22 seconds.
Oilers center Sam Gagner took a short pass from Hemsky from behind the net and one-timed a shot past Hiller for a 1-0 lead 6:48 into the period. Edmonton made it 2-0 when Taylor Hall beat Hiller stick-side with a slap shot from the left circle 8:39 into the period.
The Oilers took a controversial penalty when Theo Peckham flipped a puck that went through a hole in the glass used by photographers.
Referee Stephen Walkom ruled delay of game, a call that an NHL senior officiating manager at the game later said was incorrect. Bobby Ryan redirected a Cam Fowler shot over the left shoulder of Oilers rookie goalie Devan Dubnyk to make it 2-1 at the 16:33 mark.
Let's make a deal
Maroon, 22, was the leading scorer with Adirondack of the American Hockey League before he was dismissed from the team three weeks ago for what the organization called "behavioral issues" and "attitude problems."
Said Ducks General Manager Bob Murray: "He's been given a second chance, and I'm sure the young man knows that. I fully expect him to keep to the straight and narrow here."