ENGLEWOOD, Colo. -- Unable to close a deal for linebacker Von Miller before the end of the team's mandatory minicamp this past week, the Denver Broncos have started to consider some of the other items on their offseason to-do list.

They have had discussions with representatives for linebacker Brandon Marshall and wide receiver Emmanuel Sanders about contract extensions in recent days. Immediately following the draft, both players were cited by Broncos executive John Elway as being "next in line" after negotiations with Miller.

But the order of things may have changed, as Miller and his representatives turned down a six-year, $114.5 million offer from the Broncos.

It included a potential for $58 million in guarantees and bonuses, with $38.5 million in guaranteed money in the first two years. Guaranteed money is the major sticking point; the Broncos were unwilling to move additional guaranteed money earlier in the contract, so the two sides have, for the time being, shut down negotiations. They face a July 15 deadline to finish negotiations before the start of the season. If no deal is made by then, Miller can either play under the one-year, franchise-player tender (just over $14 million) or sit out.

The Broncos had hoped to finish a deal with Miller in time for him to attend some of minicamp and/or next week's final set of organized team activities. Miller has skipped the team's offseason program, but did make the trip to the White House with his Super Bowl-winning teammates and coaches on Monday.

Privately, Broncos officials have turned some of their attention to potential new deals for Marshall and Sanders. Signing both of them and then attempting to circle back and close a deal with Miller could be difficult, but the Broncos appear to be intent on getting some business done among those three players before training camp opens in late July.

Marshall is a restricted free agent and did not sign his one-year tender for $2.553 million. He has, however, participated in the team's offseason program after surgeries to remove 1½ screws from his foot and repair a ligament on his index finger. He and the Broncos agreed to a waiver that would cover Marshall if he were injured.

The Broncos have made it clear throughout the offseason they want to get a deal done with Marshall, who led the team in tackles in 2014 and was second on the team in tackles last season, but had to put together something for Miller first.

"I've said all along I would love for [a contract] to happen," Marshall said this past week. "This is where I want to be and they've always treated me like they want me here, even when I was on practice squad. Everybody wants to win here."

Former Broncos linebacker Danny Trevathan got a four-year, $24.5 million deal from the Chicago Bears earlier this offseason -- with $12 million guaranteed -- and the Broncos would likely have to get above that to get Marshall to sign on the dotted line.

"I think it will all work out," Marshall said.

Sanders is in the third and final year of the $15 million deal he signed with the Broncos in 2014. At the time, the opportunity to play in a Broncos offense with Peyton Manning at quarterback was plenty of incentive for Sanders to sign what some in the league believed was slightly less than market value.

Sanders has two 1,000-yard seasons for the Broncos already, with 101 catches in 2013 and 76 catches last season. He would be an unrestricted free agent at season's end and will turn 30 just after free agency opens next March.

The Broncos will have to make any offer enticing enough for Sanders to forgo a trip into the open market after the season.

For his part, Sanders has repeatedly said, "I want to retire a Bronco."

At the moment, if counting Miller's tender, the Broncos have $6.58 million worth of salary-cap room but could make more than $9 million worth of additional room if they engage a clause in wide receiver Demaryius Thomas' contract. They could also release players to create room, but it adds additional "dead money" -- salary-cap charges for players no longer on the roster -- every time they release a player with years remaining on his contract.