ORLANDO, Fla. — A few details are trickling in regarding the Broncos’ 2014 preseason schedule.

The Broncos have been told they’re likely to play their fourth and final preseason game Thursday, Aug. 28 against the Dallas Cowboys at AT&T Stadium in Arlington, Texas.

And because the Broncos will play on the road for their final preseason game, it’s less likely they will open Week 1 of the regular season with the NFL’s Thursday night, Sept. 4 opener at Seattle.

As is painfully obvious to Denver, the Seahawks are the defending Super Bowl champions, which carries the privilege of hosting the league opener Sept. 4. And the Broncos are on the Seahawks’ home schedule. It’s just not likely the teams would meet in Week 1.

There also are signs pointing to the Broncos playing a preseason road game against San Francisco in what could be the first game at the 49ers’ new Levi’s Stadium in Santa Clara, Calif. If so, the Broncos and 49ers are exploring the possibility of practicing against each other a few days before that preseason game.

“We’re working on it,” said Broncos general manager John Elway. “We’ll see how the schedule comes out, first.”

Although the Broncos and 49ers will meet during the regular season at Denver’s Sports Authority Field at Mile High, that game and their proposed preseason meeting would be spread apart.

The Broncos are less certain about their two preseason home opponents. Howard Katz, who does the NFL schedule, said he isn’t close to finalizing the 2014 schedule because of complications that include a third game in London and the Minnesota Vikings sharing the University of Minnesota’s TCF Bank Stadium this year.

Birthday boy. Peyton Manning turns 38 on Monday. He will be the first Broncos quarterback to play at age 38 since?

Nope.

Steve Beuerlein, in 2003.

John Elway was 38 in his final season of 1998, which he capped with a Super Bowl MVP award.

Pop goes the proposal. Broncos coach John Fox is more open to some rule-change proposals than others. The Washington Redskins’ idea to move the kickoff line from the 35 to 40? Fox thinks this would contradict its intent. The purpose behind the proposal is for kickers to boot the ball out of the end zone and all but eliminate kickoff returns, which are considered the most dangerous plays in the game because of the high-speed collisions.

But Fox believes moving the kickoff up 5 yards would open up another strategy.

“People will do the pop kick, so there will be more returns,” Fox said. “You can get better (defensive) field position with the pop kick because your coverage can get there faster. I don’t think that will fly.”

Voting on proposed rule changes will take place Tuesday or Wednesday.