Dallas is losing a popular guy at the sidelines.

As we told you earlier, the Mavericks no longer employ Avery Johnson.

In what commentators call a first of many similar moves, the the league's highest payroll produced a second straight first-round knockout from the playoffs.

The former Spurs point guard leaves with an impressive resume after three-plus seasons.

So is it the players, the coach, the owner?

It all leaves East Texans trying to explain: what's up with the Mavericks?

"They don't have a big scorer. Dirk can only do so much. He wants to be second man and isn't ready to lead a team."

"It just appears they kind of fade every year come play off time, so I don't know."

"Cuban. He shouldn't have brought in Kidd."

Tell us what next week's, "what's up with that?" segment should be by emailing us at: what'sup@nbc56.com.