"I don't think it's serious," head coach Dave Tippett said following his team's 3-0 loss, according to TSN. "I didn't see it because of any one play. He was hurt in the second (period) and tried it in the third but couldn't go."
The 25-year-old winger recorded one shot on net in 11 minutes of ice time before departing. He tallied one goal and one assist in his debut with the Oilers on Tuesday.
Edmonton acquired the native of Ontario from the Detroit Red Wings ahead of Monday's trade deadline in exchange for forward Sam Gagner and a pair of second-round draft picks.
Athanasiou contributed 10 goals and 24 points through 46 games with the Red Wings this season.