Despite the win, Wallace was upset after getting one reception for 15 yards, a reaction that made local and national headlines. Wallace explained on Monday that he was personally upset and didn't mean to cause a stir with the team.
"I'm mad at myself just because I didn't have a good game," Wallace said in the locker room. "That's all."
Wallace was asked to clarify comments he made to reporters Sunday. In terse comments he had said to ask the coaching staff why he didn't get many opportunities against Cleveland.
"I was upset with myself," he said. "It wasn't really anything else to do with anything. I would've told you the same thing regardless. If you ask me about the plays, I don't really have the answer. That's all I meant by that."
Wallace signed a $60 million contract with Miami during free agency and wanted to make a splash in the opener. That likely led to his postgame frustration.
Wallace confirmed that he talked with Dolphins coach Joe Philbin on Monday about the situation and said they've smoothed things over.
In turn, Philbin and the coaching staff publicly backed Wallace when asked about the situation.
"I want our players, all 46 players who dress, to want to make an impact and want to contribute and make a difference in the football game," Philbin said.
Added Dolphins offensive coordinator Mike Sherman: "Mike's a competitor. He wants to feel a part of the game, as I hope that he would. He came here to be a factor in our season and our success. The fact that he's disappointed he only caught one ball, that's expected. I have no problem with that."
Wallace still made an impact on offense. His presence forced constant double-teams from Cleveland's defense. That allowed other Miami receivers, such as Brian Hartline (nine catches, 114 yards) and Brandon Gibson (seven catches, 77 yards), to produce against single coverage.
Wallace said he's happy for his teammates and wants to play better next week. The Dolphins (1-0) face the Indianapolis Colts (1-0) on Sunday.
"I'm always happy to win. That's what we play for, to win," Wallace said. "I expect to win. So I don't get overly excited when we win, because every time we step on the field, that's what I'm there for. If you see us win or you see us lose, I'm not going to be jumping around either way."