Pineda is at 153 innings through 25 outings and the rookie will make three more starts in the season's final month.
Pineda will start this Saturday in Oakland on six days' rest. He'll then go again the following Saturday, Sept. 10, at Safeco Field against Kansas City before wrapping things up on the road in Minnesota on Sept. 21, according to the schedule laid out by pitching coach Carl Willis.
"Carl has done a great job mapping this out," manager Eric Wedge said. "It's not an easy thing to do. You talk about me with lineups, well, him with that starting rotation and trying to map it out and accomplish what we need to accomplish and be where we need to be at the end, that's a nice puzzle, too.
"We started this a long time ago and have tried to stay as close to that bar as possible. And I think in the end it's going to play out OK."
Pineda has won only once in his last eight starts since July 4, leaving him 9-8 with a 3.71 ERA. But the American League All-Star has looked strong his last two outings, and the Mariners aren't worried that he's tiring, but more that they want to keep him at their projected innings limit.
"We want to make sure he's as good as he can be next year, too," Wedge said. "Ultimately you have to recognize what he's done the last couple years, where he's at now and where we want him to be next year."