The initial review of replacement officials' performance in Sunday's early games "went well with no major issue," said Ray Anderson, the NFL's executive vice president of football operations.
The replacement officials already have been assigned to Week 2 games, Anderson said.
By assigning the replacement officials to work in Week 2, the NFL signaled there's still no end in sight to the lockout of regular officials.
The NFL and the locked-out officials have been at odds over pay and retirement benefits. The NFL also wants to add more crews and make some officials full-time employees. Game officials are part-time employees.
The NFL Players Association recently sent a letter to the NFL asking that the locked-out officials be reinstated immediately because of concerns over player safety, according to an NFLPA spokesman.
The NFL made its point, of course, by assigning the replacements to next week's schedule of games.
The officials were locked out by the NFL in June.
Follow Steve Wyche on Twitter @wyche89.