The exchange started with a silly (or stupid) joke about football, but not the kind that will be played in college stadiums around the country this weekend.
After Germany blasted FIFA World Cup host Brazil 7-1 on July 8, I joked on Twitter that the Brazilians must have hired former Texas Longhorns defensive coordinator Manny Diaz as a defensive consultant.
Within an hour, Diaz sent me a direct message on Twitter, asking me to call him the next day.
Our conversation the following day was cordial, and I thanked Diaz for reaching out. I apologized for the inconsiderate joke and told him it wasn't anything personal. I could have used a handful of coaches as the butt of the not-so-funny joke, but, for whatever reason, Diaz popped into my head.
The last time college football fans saw a Diaz-coached defense on the field, the Longhorns allowed a school-record 550 rushing yards in a 40-21 loss at BYU on Sept. 7, 2013.
Then-Texas coach Mack Brown fired Diaz the next day.
For Diaz, it's his first shot at redemption, albeit against what is expected to be one of the country’s most prolific offenses.
"Everybody in this profession is at heart a competitor," Diaz said. "I'm super, super excited about the opportunity to get back out there and go at it again."
Diaz's fall from grace was nearly as stunning as his meteoric rise through the college coaching ranks. A former ESPN production assistant, Diaz started as a graduate assistant at Florida State in 1998 and was a defensive coordinator at an FBS school within eight years.
After spending four seasons at Middle Tennessee State from 2006-09, Diaz transformed Mississippi State’s defense into one of the country’s best in 2010. In 2011, Brown hired him to turn around Texas' defense.
The early results at Texas were good: The Longhorns led the Big 12 in total defense, rushing defense and pass defense in his first season. In 2012, the Longhorns allowed only 212 passing yards per game in the pass-happy Big 12 despite losing star defensive end Jackson Jeffcoat and linebacker Jordan Hicks to injuries.
Then, the wheels fell off at the start of the 2013 season. Nearly a year later, Diaz is reluctant to talk about what transpired at Texas. He has never criticized Brown or the decision to replace him with Greg Robinson only two games into the season.
"There's nothing to me that matters about what happened," Diaz said. "The issues there were multifaceted, and I think everybody involved, if they had a chance to go back, would change some things."
In the end, firing Diaz didn’t accomplish much. The Longhorns lost to Ole Miss 44-23 the next week before winning six games in a row, including a 36-20 upset of then-No. 12 Oklahoma. But the Longhorns lost three of their last four games, allowing 38 points against Oklahoma State, 30 against Baylor and 30 against Oregon in the Valero Alamo Bowl.
Brown was forced to resign and coached the Longhorns for the final time in the bowl game. Brown, who had a 158-48 record in 16 seasons with the Longhorns and guided them to the 2005 national championship, now works as an analyst for ESPN.
Diaz, 40, spent much of last season coaching his sons' football teams. He consulted with a few teams but declined to name them because "Twitter would blow up."
Louisiana Tech coach Skip Holtz called him in January and offered him a job. Holtz wouldn't have had to go far to find out what really happened to Diaz at Texas last season. His son, Trey, is a sophomore walk-on quarterback with the Longhorns.
"I think Skip had an intimate knowledge of what was really happening behind the doors," Diaz said.
Diaz isn't the only coordinator looking for redemption this season. Former Kansas coach Mark Mangino, who resigned amid allegations that he abused his players, is Iowa State's new offensive coordinator. New Notre Dame defensive coordinator Brian Van Gorder's past two college coaching stops, as Georgia Southern's head coach and then Auburn's defensive coordinator, were far from spectacular. New Louisville defensive coordinator Todd Grantham's defense at Georgia allowed a school-record 377 points last season.
But perhaps no coach has fallen as hard or fast as Diaz, who went from a wonder boy to, well, the butt of jokes in a matter of a couple of games.
"I think it's the nature of this profession," Diaz said. "I think you see it now more than ever. I think the game is more volatile than ever."
Diaz's career rehab will start near the bottom of FBS football. Last season, the Bulldogs went 4-8 in Holtz's first season. Louisiana Tech's victories came against FCS foe Lamar and FBS opponents UTEP, Florida International and Southern Miss, which combined to win four games in 2013. The Bulldogs lost consecutive games against Tulane, Kansas (which ended a 22-game losing streak to FBS foes) and Army in September.
Holtz hired Diaz to do what he did at every one of his previous stops -- make the defense better.
"I think Coach Diaz has done a phenomenal job with this defense and the things he has put in," Holtz said. "I think he makes it very complicated, but yet, at the same time, it is very simple for them to learn. It appears complicated, but I think he has really simplified it in terms of being user-friendly for the players to take it and embrace it."
The Bulldogs' first challenge is a daunting one, trying to slow down OU's high-powered attack. The Sooners had their way against Diaz's defenses in two previous meetings, outscoring the Longhorns 118-38 in victories in 2011 and '12.
"It's a program I have a lot of respect for," Diaz said. "They challenge the bond of your team. When I got here and found out we were playing Oklahoma, that's the first thing I told our players. It's what they do with their style of play and tempo. If you drop your gloves, they'll pound you."
The Bulldogs' defensive coordinator knows all too well about being knocked down. Will Diaz get back up?