Ratter and Shough battled for the starting position throughout the offseason, with Rattler emerging as the starter for the season opener.
He completed 15 of 21 passes for 136 yards and was sacked three times, but Rattler lost a fumble on the Saints' opening offensive drive for the second consecutive game, and threw an interception that was returned for a touchdown on the team's first drive of the second quarter, after the defense made a goal-line stand and stuffed Tampa Bay on four runs from the 1-yard line.
For Rattler, the pick-6 — a pass that was batted by linebacker Anthony Nelson, who corralled his carom and fought through an attempted tackle to score from four yards out — was Rattler's sixth turnover in as many quarters, dating back to the previous game against Chicago.
Shough entered with 4:02 left in the third quarter and New Orleans trailing 17-3. He completed 17 of 30 passes for 128 yards, was intercepted once and sacked twice in his NFL debut. His interception was a pass that was in the hands of receiver Chris Olave, but wrestled away by Bucs safety Antoine Winfield.
"We just needed to find a way to create something on offense," Moore said. "It has more to do with the offense collectively. We're just not executing and playing at a high enough standard and we've got to find a way to move the football consistently, protect the football and score points. This is a pure, full offensive evaluation point. We're not there.
"I think we've just got to evaluate this whole thing in the next 48 hours on offense, find the solutions that give us the best chance to win."
The season-low scoring output for the Saints (1-7) had been 13 points, which they'd twice been limited to, before they were kept out of the end zone Sunday.
Rattler, prior to the current six-turnovers-in-seven-quarters stretch, had turned over the ball once in the first six games.
"It's part of the game," Rattler said of the change. "I understand. You can't control everything but I'm going to be a great teammate and respond the right way. Be a pro about it and help in any way I can.
"The last two weeks (with turnovers), I think last week (against Chicago) I started pressing. I don't feel like I pressed at all this game. I think I got careless with keeping it high and tight on that first drive on the run, and then the tipped pick was unfortunate."
Moore noted the positives that Rattler has provided for the bulk of the season.
"Spencer has done plenty of good this season when you look at it from a bigger perspective," he said. "We need to find a way to get the thing going. That's our project and that's our efforts moving forward, is to find solutions moving forward."
For Shough, it was a debut against a defense that has confounded many over the years.