Lavonte David sat on a stool in front of his locker, his head down, trying to make sense of what just happened.
A couple of Tampa Bay Buccaneers teammates came over and patted the linebacker on the back. None of it did anything to make his huge mistake go away.
Nick Folk kicked a 48-yard field goal with 2 seconds remaining after David's personal foul on Geno Smith following a big run gave him the chance, and the New York Jets pulled out an improbable 18-17 home victory in the season opener Sunday.
"I don't know what to say," David said softly. "They called a flag. I guess I hit him out of bounds. Everybody told to me to keep my head up. All the guys in here were very supportive."
The Jets also ruined the return of Darrelle Revis, their former star cornerback who was mostly quiet in his first game since suffering a season-ending knee injury at Miami last September. Revis finished with one tackle and two passes defensed.
With the Jets trailing 17-15 and time running out, Smith scrambled for 10 yards and was shoved while he was out of bounds by David. The 15-yard penalty put the ball at the Buccaneers 30, and Folk won it.
"That's just him playing football," safety Mark Barron said. "I'm sure in that situation, it's hard to stop. I'm sure he didn't mean to do it. We're not going to put the game on him. That's not his fault.
"There were penalties throughout the whole game."
Payton returns winner
Last season, while suspended in connection with the NFL's bounty probe, New Orleans coach Sean Payton watched helplessly from afar as the Saints fielded one of the worst defenses ever, yielding a single-season record 7,042 yards. One of his first moves upon reinstatement was to hire Rob Ryan as defensive coordinator.
Payton put the new product on the field right away, electing to kick off when the Saints won the coin toss.
"Sean sent the defense out first, which you would never have seen in the past," safety Roman Harper said. "So just a whole different feel and the things that we're trying to accomplish, this is just one step in the right direction."
The result was a 23-17 win over the Falcons that was sealed when Harper intercepted Matt Ryan's tipped fourth-down pass in the end zone.
"It was just important to get the first win," Payton said. "You try to compartmentalize each week, each game, and we played a good team. ... We fought hard, especially late."
Smith wins K.C. debut
It was Kansas City's most lopsided season-opening victory in 50 years, a perfect start to the Andy Reid era. Alex Smith threw two early touchdown passes, Kansas City's defense dominated, and the visiting Chiefs handled the Jacksonville Jaguars 28-2.
The last time Kansas City won its opener by such a wide margin was 1963, a 59-7 victory against Denver.
The Chiefs have a new offensive system, new offensive coordinator in Doug Pederson, new play-caller in Reid and a roster full of teammates who were new to Smith. So it looked to be a lot to ask of Smith to be so sharp so quickly.
"This always gets talked about: new faces, new system, new guys coming in," Smith told ESPN.com's Adam Teicher. "But once the regular season starts, no one cares. Those are just excuses.''
Another thing Smith did the past two years with the 49ers: win. San Francisco was 19-5-1 in his last 25 regular-season starts before Smith was benched in favor of Colin Kaepernick. That's eventually how his time with the Chiefs will be judged, a fact Smith didn't overlook.
"It's always (better) to go watch the film and try to get better after a win," he said.
Injuries hit Steelers
The first Sunday of the NFL season was a costly one for the Pittsburgh Steelers.
Pro Bowl center Maurkice Pouncey ripped up his right knee and linebacker Larry Foote ruptured his biceps during Pittsburgh's 16-9 home loss to Tennessee, likely sidelining both players for the rest of the season.
Kansas City running back Jamaal Charles and Jacksonville quarterback Blaine Gabbert each departed the Chiefs' 28-2 victory with injuries.
Charles left in the third quarter -- after getting sandwiched by linebackers Geno Hayes and Paul Posluszny -- and returned for two carries before calling it a day in the fourth because of a quadriceps injury.
Gabbert cut the back of his right hand on a defender's face mask in the closing minutes and needed 15 stitches. He threw two interceptions while playing with a hairline fracture in his right thumb.
Carolina lost starting right guard Garry Williams to a left knee injury in the first quarter of a 12-7 loss to Seattle, and Detroit finished a 34-24 victory against Minnesota without Jason Fox after the offensive tackle left with a groin injury.
New York Giants cornerback Prince Amukamara was knocked out of Sunday night's opener because of a concussion sustained after a helmet-on-helmet collision with teammate Ryan Mundy when they were making a tackle on Dallas' Terrance Williams.
Mars the Super choice
Grammy-winner Bruno Mars will perform at halftime of the Super Bowl.