The Whiz is 0-for-4 so far when throwing the red flag in Tennessee, but he started off even rockier in Arizona with five straight failed challenges in his rookie campaign. He fared much better in his second season in the desert with a 4-5 mark and a trip to the Super Bowl, a trend the Titans surely would love to see repeated.
Don McPeak-USA TODAY SportsDon McPeak
John Harbaugh - 6
Harbaugh's longest streak of failed challenges came in 2010. Harbaugh was working on a new string in 2014 until a successful challenge against Tennessee ended a run of four straight misses.
Jason Bridge-USA TODAY SportsJason Bridge
Rex Ryan - 6
Ryan missed on six straight challenges in his second season with the Jets, but that didn't stop him from going to the AFC Championship game. Ryan was really feeling it in 2011, winning nine challenges in a row and finishing 9-1 for the season.
Dennis Wierzbicki-USA TODAY SporDennis Wierzbicki
Jay Gruden - 6
Gruden has the dubious distinction of having the most failed challenges to start a career of any current head coach. The rookie coach isn't getting any help from general manager Bruce Allen, who also doubles as Gruden's replay consultant. His brother, Jon, likely wouldn't help much either, as he's 29-52 when throwing the red flag.
Geoff Burke-USA TODAY SportsGeoff Burke
Lovie Smith - 6
Back in the days of Rex Grossman and Kyle Orton, Smith erroneously challenged six consecutive calls. After finally getting one right in 2005, he strung together five more misses.
USA TODAY SportsMike Carter-USA TODAY Sports
Bill Belichick - 6
Belichick has been successful 39 of the 95 times he's pulled the red flag out of his sock. Like Jay Gruden, he lost his first six challenges out of the gate with his new team, and has strung together six misses three additional times. His longest win streak? Seven, back in 2011.
David Butler II-USA TODAY SportsDavid Butler II
Jeff Fisher - 7
Fisher missed on seven consecutive challenges over three seasons with the Titans, also failing on 12 of 13 from 2007-2010. Going back to when the challenge system was first implemented back in 1999, Fisher is 26-46 overall.
Getty ImagesChristian Petersen
Ron Rivera - 7
Rivera is the esteemed holder of the longest active string of failed challenges with seven. Rivera might be better off keep the reg flag to himself as he sports a dreadful 3-12 record in his career.
Tom Lynn/Associated PressTom Lynn
Andy Reid - 8
Reid put together eight straight failed challenges on two different occasions with the Eagles. Luckily for Chiefs fans, Reid didn't bring his red-flag misfortune with him to Kansas City. Reid is 9-for-13 so far in his two seasons with KC.
Getty ImagesEzra Shaw
Tom Coughlin - 8
Coughlin is almost batting .500 (50-of-105) when throwing the red flag. He missed eight in a row in 2011, but don't feel bad for him. The Giants won the Super Bowl that season.
Sean Payton - 8
Payton is 33-of-46 on challenges in his coaching career. His worst record came in 2007, when he began a streak of eight failed challenges, while also enduring his worst as a coach (7-9). Coincidence?
Andrew Weber-USA TODAY SportsAndrew Weber
John Fox - 11
Fox has lost his last five challenges with Denver, and nine of his last 10, but that still falls short of his mark with the Panthers in 2004-05, when he missed 11 in a row.
Getty ImagesDoug Pensinger
Marvin Lewis - 11
Lewis stands right alongside Fox when it comes to having the longest string of failed challenges. Lewis was charged a timeout 11 consecutive times and 14 out of 15 over the 2006-07 seasons. It's not all bad news Bengals fans. Lewis has been successful on nine of his last 12 challenges.