Dallas Cowboys tight end Jason Witten could miss the remainder of the preseason with an abdominal injury that occurred during Monday night’s game against the Oakland Raiders.

Witten was examined Tuesday and had an MRI, the team’s website reported Wednesday.

Indications are that the injury might be serious enough to hold the veteran out until the Sept. 5 regular-season opener against the New York Giants.

The injury apparently occurred during the first quarter of the Cowboys’ 3-0 win when Witten caught a pass from Tony Romo that resulted in a 2-yard loss. Witten took a hard hit from Raiders linebacker Rolando McClain and went to the sideline.

However, he returned for the next series and had an 8-yard reception before the starters retired to the bench for the evening.

Witten has been the model of resiliency for the Cowboys, missing only one game in his 10-year career. That came in 2003 when he sustained a broken jaw.

With Witten out, rookies James Hanna and Andrew Szczerba will get more opportunities in practice.