Rangers forward Lee Stempniak is the latest NHL player diagnosed with the mumps, bringing the league-wide total to 17 since the outbreak began in late October.
The number of confirmed cases could climb to as many as 22 this week.
The Rangers confirmed Stempniak's diagnosis to reporters Monday. He has been in isolation during the contagious phase and will rejoin the team Tuesday at practice.
Five more players — Penguins backup goalie Thomas Greiss and forwards Steve Downie and Brandon Sutter and Devils forwards Patrik Elias and Martin Havlat — were sent by their teams Monday to be tested for the illness.
The NHL mumps outbreak so far has affected five teams, with the Penguins, Wild, Ducks, Devils and Rangers reporting confirmed cases.
Three Penguins have tested positive, including star Sidney Crosby, who missed two games but has resumed play. Beau Bennett and Olli Maatta tested positive last week and remain out with other injuries.
Devils players Travis Zajac and Adam Larsson and Rangers forwards Tanner Glass and Derick Brassard have all missed time because of the mumps this season.
Several Sabres players sat out games over the weekend, but the team has said those cases were due to "flu-like symptoms" and not the mumps.