Yes, it's actually happening.Tony Romo, a few days removed from his old career as the quarterback of the Dallas Cowboys and into his career as a color analyst for CBS, is a member of the Dallas Mavericks.For one day.Romo was swooped up owner Mark Cuban of the Mavericks and will suit up on Tuesday night against the Denver Nuggets. He will reportedly not be playing in the game.(In addition, Bill Simmons, in his podcast for "The Ringer", said he heard NBA Commissioner Adam Silver hated the whole idea, by the way.)

Nonetheless, Romo is out there with the Mavericks as they prepare.

Mavericks coach Rick Carlisle, who I can't imagine is very amused by this whole thing, said that Romo will take part in morning shootaround and layup lines with the team.

"He's a guy who has a great intellectual curiosity about basketball. I can tell that," Carlisle said. "I just think Tony is looking forward to what a prep day in the NBA is like."

He's getting a firsthand look. Here's Romo coming out to the morning shootaround along with his son.

Here's the team photo with Romo in it, which might be a confusing thing to see several years down the road:

Here he is suiting up in his new uniform:

Romo flashed the jumper in the shootaround. Check out this video of him getting all net on a long shot:

Former NBA player Caron Butler, who played against Romo when both were in high school in Wisconsin, said this week that he thinks Romo could have made it to the NBA.

"Believe it or not, man, when we were in the prime of our careers, I used to always talk about it: [Romo] could have easily been a professional basketball player," Caron Butler told ESPN. "And a lot of people were like, 'Man, you're crazy for saying that,' but Tony could shoot. He could handle the ball. He had a knack for scoring, man, he really did."

In 1998, Butler and Romo both made the All-Racine County boys basketball team in Wisconsin. According to ESPN, Romo played at Burlington High School, and averaged 24.3 points, 8.8 rebounds and 4.7 assists per game before moving on to Eastern Illinois. Romo was reportedly recruited by Wisconsin-Green Bay and others, but he had already committed to Eastern Illinois for football.

Dirk Nowitzki and others are still having fun with their new teammate, though.