Romeo Crennel (0-5), Dick Jauron (0-4) and Rod Marinell (0-4) still haven't won replay challenges this season. That makes Crennel and Marinelli 0-fer-life as NFL head coaches.
The key to challenges is knowing when NOT to make them. Jack Del Rio remains the only head coach with a perfect record in replay challenges this season. He has made the fewest challenges of any head coach this season (two). Mike Holmgren has made three challenges, winning one. That's actually pretty good for him. Bill Parcells leads all coaches with four reversals.
Dennis Green, Art Shell, Brad Childress and Lovie Smith have the most failed challenges this season (six apiece). Their record supports another theory: desperate teams make desperate challenges, leading to poor replay records. We'll see how that holds up over time. It sure makes sense.
Looking at our ref-based stats (see chart below), we notice that Jeff Triplette, Bill Carollo and Tony Corrente have the fewest overall reversals (one each). That probably won't make Bill Belichick happy. Belichick was upset Sunday when Triplette's crew wrongly awarded an additional timeout to the Lions. The Patriots wound up winning the game anyway, but sheesh, that could have been a doozy.
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Note that Carollo remains undefeated in coach-initiated challenges (12-0 record). This means he's either doing a good job, or perhaps he's just stubborn and won't admit his errors even after watching them on replay.
One of the new columns this week shows how many additional penalties each ref calls against the road team per game. Gerry Austin (2.6) and Mike Carey (2.5) head the list. The differential does not appear to be particularly significant, but I thought it might be interesting to take a peek anyway.
FULL REF STATS THROUGH WEEK 13