Denver Broncos coach John Fox is appealing his $30,000 fine by the NFL for inappropriate behavior toward a replacement officiating crew, ESPN.com reported Friday.
Defensive coordinator Jack Del Rio is expected to appeal his $25,000 fine as well.
Fox and Del Rio were fined for arguing with the officials during a six-minute delay in Denver's loss to the Atlanta Falcons in Week 2.
The league had asked coaches and team personnel to tone down their behavior toward replacement officials.
New England Patriots coach Bill Belichick and Washington Redskins offenses coordinator Kyle Shanahan were fined last week for similar offenses.
A source told ESPN that fines will not be rescinded, even though replacements will no longer be used after the NFL reached a contract agreement with its regular officials earlier this week.