Austin injured his right hamstring after a 39-yard reception in the second quarter. He spent the rest of the half with his hamstring wrapped, and wore street clothes on the sideline in the second half.
The 27-year-old injured his left hamstring in training camp, but returned for Dallas' season opener against the Jets.
"This one's higher, the other one was a little lower in my leg. It's frustrating, obviously, it's not the same one it's a different one," Austin said.
The Monmouth product has 28 catches for 403 yards and four touchdowns in six games played this season.