Steelers receiver DK Metcalf swiped at a fan leaning over the railing in the front row at Ford Field during the second quarter of Pittsburgh’s 29-24 win over the Detroit Lions on Sunday.

Metcalf and the fan, wearing a black-and-blue shirt and a blue wig, were speaking to each other before the two-time Pro Bowler threw a right hand toward the man’s face. Metcalf did not appear to make much, if any contact.

“I heard about it, but I hadn’t seen it,” Steelers coach Mike Tomlin said. “I hadn’t had an opportunity to talk to DK.”

Although there wasn’t a penalty flag thrown on the field, the league will review the incident and Metcalf could face discipline.

He finished with four receptions for 42 yards.

The 28-year-old Metcalf is in his first season with the Steelers after spending six seasons with Seattle.

The Associated Press contributed to this report.