The Jets (14-6-3) were down 2-0 after 20 minutes, and to add to the situation, Mason didn't return to the game after the first period due to an upper-body injury.
"We pulled him as a precaution. We'll get him looked at tomorrow and get a real good idea of how he's feeling," said Maurice, who couldn't be certain if it was Jannik Hansen's high one-timer that caught Mason in the mask that was the culprit for the goaltender's symptoms.
"He stayed in and said he was OK after that. We talked to him at the time-out. By the time he got off the ice he got off that ice, he was not feeling right. For us, that's enough, he's got to come out."
Connor Hellebuyck came on in relief in the second period, and would make 20 saves on 21 shots the rest of the way.
Couture's second of the night came shorthanded, and was the only one Hellebuyck couldn't keep out. San Jose's second ranked penalty kill forced a turnover at their own blue line. And Couture then won the footrace to the puck, and slid a backhand past Hellebuyck to make it 3-0 Sharks.
"You've got an opportunity on the power play to make it 2-1, and it goes the other way, it takes the wind out of your sails," said Wheeler.
"It hurt a lot. We had a couple chances on the power play before that… 2-1, momentum is in our favour. Even if the period ends 2-1, we know it's a hockey game we like to play."