Marshall, who on top of his health issues has asked for a trade, missed Monday's training camp practice, a day after an apparent leg injury knocked him out of Sunday's team workout early.
Meanwhile, defensive end/linebacker Jarvis Moss, the Broncos' first-round draft pick in 2007, skipped another day of practice as he considered his football future.
Marshall underwent hip surgery in late March. He took part in the Broncos' opening training camp practice last Friday but sat out Saturday's session with an undisclosed injury. He returned Sunday only to pull up lame, grabbing his hamstring after running a deep route before limping off the field.
New Broncos coach Josh McDaniels would neither discuss the specifics of Marshall's injury nor estimate when the receiver could rejoin the team's practices.
Marshall started 15 games last season, finishing third in the league with 104 catches for 1,265 yards receiving. He later voiced unhappiness with his contract and complained the team's medical staff did not properly diagnose his hip injury.
In a June meeting between Marshall and Pat Bowlen, the team owner said Marshall had requested a trade and the wide receiver even posted a farewell to Broncos fans on his blog. The Broncos, who traded away Jay Cutler after the Pro Bowl quarterback clashed with McDaniels, have given no indication whether they'll accommodate Marshall.
Moss, who turned 25 on Monday, left the team over the weekend after slipping down the depth chart. He has had 3.5 sacks in two difficult seasons with the Broncos, including a rookie campaign in which he was limited to six games after breaking his right fibula.
One of his best friends on the team, defensive lineman Marcus Thomas, said Sunday that Moss planned to return. However, he remained a no-show, and McDaniels declined to shed any light on Moss' future with the team.
"It is a personal situation," McDaniels said. "We granted Jarvis permission to take the time to do what he needed to do. Again, I am not going to talk about that based on the personal situation and the personal matter that it is."
Safety Brian Dawkins, receiver Brandon Stokley, tailback Correll Buckhalter and linebacker Wesley Woodyard missed the Monday morning practice on a decision by McDaniels. The coach has said previously he would give many of his veteran players periodic breaks. The four were back on the field in the afternoon to take part in the day's second practice session.
NOTE: Linebacker Nick Greisen was carted off the field after suffering an apparent knee injury during the team's morning practice session. McDaniels declined to discuss Greisen's status.
Copyright 2009 by The Associated Press