NFL commissioner Roger Goodell had indicated he would reduce Marshall's suspension to two games if he kept in contact with a league-appointed counselor and stayed out of further legal trouble. Marshall and his attorney, Harvey Steinberg, want a further reduction in that penalty.
A message was left for Steinberg on Tuesday night.
"No word on how it went. I have no idea," coach Mike Shanahan said earlier in the day. "He's going through the appeal process, no clue what went on or when it's going to be finished. I'm sure it will be done in a timely fashion."
Earlier this month Goodell suspended Marshall over a series of off-the-field misdeeds, most notably his March 6 arrest on a domestic violence warrant filed by his former girlfriend in Atlanta. No charges have been filed in that case.
Marshall caught 102 passes for 1,325 yards and seven touchdowns last season and has shown no falloff this summer despite suffering a gash on his right arm that required emergency surgery this spring and sidelined him for almost all of the team's offseason field work.