"Other than getting beat, there was nothing to get dissatisfied about," said Mattingly, whose club couldn't hit six Mariners pitchers.
"It wasn't a lack of effort, they just shut us down. We still had a chance to win the game. It's not one you walk away from really disappointed, it wasn't that we didn't come to play. It only cost us one loss."
Dee Gordon came closest to breaking up the no-hitter. He attempted a bunt single in the fourth inning but was thrown out with a barehand grab by Seattle third baseman Kyle Seager. Gordon thought he beat out an infield single leading off the ninth inning but was called out at first base by umpire Ted Barrett.
Gordon is batting only .219 on this trip, but Mattingly said he is pleased with the shortstop's offensive turnaround since returning from a four-game benching.
"He's having calmer at-bats," said Mattingly. "We're a better team if he hits leadoff. He's more confident, his at-bats are better and I'm good with it. He's swinging at more strikes."