Officially speaking: Referee confidential

Posted by ESPN.com's Mike Sando

Scott Green's crew assessed zero penalties against the Patriots. Al Riveron's crew assessed one penalty against the Browns.

Those figures helped bring down the overall numbers for Week 8, despite the Rams' protests.

The chart breaks down crews by referee, penalties assessed per game, replay challenges and replay reversals.

The number of replay challenges per game increased every season from 2003 to 2007, but the numbers are down to their lowest levels since 2004 this season. Fewer challenges mean fewer interruptions, generally a good thing in my view.

John Parry and Jerome Boger remained the only referees without a replay reversal this season. Peter Morelli joined Green with a league-high five reversals after initially disallowing a Chiefs touchdown pass against the Jets.

Available for download: full crew-by-crew breakdowns for penalties and replay.