Miller took over with the Sabres trailing 3-2 on Friday night in a game they need one point to clinch a playoff spot. It's Miller's first appearance since missing four games after taking a shot off the collarbone in a 4-3 loss to Toronto on March 29.
It's unclear if Enroth was hurt. He made 16 saves, but gave up two goals on consecutive shots in a 39-second span midway through the second period.
The Sabres were playing their home finale, and close their season at Columbus on Saturday night.