Nabers (knee) was not spotted at the portion of Tuesday's practice open to the media, but he later took the field in uniform, according to Connor Hughes of SNY.tv.
The apparent absence for Nabers may have raised some alarms after he said Monday he was unsure about his Week 1 availability, but it turns he was able to join Tuesday's session midway through. It's unclear how much work he will get in Tuesday, but it does bode well for his status that he was out there at all.