Is Rawle Marshall the Next Josh Powell or Marquis Daniels?

Where to the Mavericks get these guys? It's amazing to me that they keep finding and signing undrafted rookies--and a lot of them work out! Everyone talks about the Mavericks with the high salaries. But their best team management by far is with the guys they pay very little. If the salary cap was about $2 million per year, the Mavericks would be the best team in the NBA. The latest one is Rawle Marshall. If Rawle Marshall works out, I nominate Donn Nelson for consideration as executive of the year, even if the Mavericks do have sky-high salaries, still don't play great defense, have never settled on a roster, and underperform in the playoffs nearly every year.