Campbell was pushed into the end boards by Washington Capitals' superstar Alex Ovechkin Sunday in the first period of Sunday's 4-3 loss in overtime. He lay on the ice for several minutes, holding his right shoulder.
According to various reports, Campbell suffered a broken collarbone. An official announcement on his status will not be made until Tuesday.
Ovechkin received a five-minute major boarding penalty and a game misconduct. It was his third game misconduct this season. He also received game misconducts for a hit on Buffalo's Patrick Kaleta on Nov. 26 and a knee-on-knee hit on Carolina's Tim Gleason three days later.
The NHL held a disciplinary hearing with Ovechkin on Monday regarding his hit on Campbell. There has been no announcement yet regarding a suspension.