BALTIMORE -- Wide receiver Mike Wallace added his own personal extra point after scoring a 66-yard touchdown in Sunday's 13-7 season-opening win over the Buffalo Bills.

"A lot of people wrote me off," he said. "They think I don’t have it, but I’ve got something for them. I told you all that from Day 1. They better get ready, because I’m coming.”

There were questions whether Wallace could become a legitimate weapon in the NFL again. He turned 30 last month and is coming off a season in Minnesota where he set career lows in receiving yards (473) and touchdowns (two).

When he signed as a free agent, Wallace said he would get the "last laugh." In his first game with the Baltimore Ravens, he caught his longest pass since Oct. 12, 2012, when he pulled in an 82-yard touchdown pass from Ben Roethlisberger while he was with the Steelers.

"Overall it was pretty simple, and his speed got the job done," quarterback Joe Flacco said. "It was a really easy throw; nobody was back there. He did a great job beating the guy with his speed. I think you can see his athleticism, because after he ran so well, he was able to stiff-arm the guy and make sure he got in the end zone."

The play that produced the Ravens' only touchdown Sunday was originally a running play. Flacco then called an audible when the Bills didn't play a safety deep.

Wallace didn't know he was going to get the ball, but he knew he would get open when Buffalo put safety Duke Williams on him.

"If you have a safety on me," Wallace said, "he’s dead every time.”

Wide receiver Steve Smith Sr., who was lined up to the left of Wallace, drew two defenders to clear out the middle of the field. When Wallace got behind Williams on a skinny post route, all he had to do was catch Flacco's pass.

"I feed off the other guys," Wallace said. "Breshad [Perriman] had just went over the top of the other guy for the first down and a big play. I was like, ‘All right, it’s time for me to get one.’ We have bets over who’s going to get a 40-yard touchdown first, so he kind of owes me right now.”

The Ravens brought in Wallace because they desperately needed speed on the outside. Baltimore averaged an NFL-worst 10.4 yards per reception last season.

Wallace, who spent the first four seasons of his career with AFC North rival Pittsburgh, said it "felt normal" to make such an immediate impact with Baltimore.

"I feel like we’re all going to do well because we care about each other," Wallace said. "This is a great organization. They know how to win. They know how to get things done, so it just feels right.”