7. Josh Richardson
The Dallas Mavericks traded for Josh Richardson on draft night in 2020 in exchange for Seth Curry.
One of these players was great in Dallas, the other, not so much.
Richardson was the latter of the two, and Dallas likely regrets trading Curry for Richardson (even though they just signed him back this summer). He was supposed to be Dallas' new wing defender who can also get a bucket when he needs to, but his performance during his one season in Dallas was underwhelming.
Richardson started in 56 games during the 2020-21 and averaged 12.1 points, 3.3 rebounds, 2.6 assists, and 1.0 steals per game. He also shot an underwhelming 33 percent from downtown. That was a massive downgrade as Curry shot 45.2 percent from downtown the season before.
Curry isn't as good defensively as Richardson was, but J-Rich's defense wasn't as great as it should have been.
After playing over 30 minutes per game and starting 56 of 59 games during the regular season, Richardson saw his role diminish.
Richardson only played 13.4 minutes and 4.9 points per game during the playoffs and was a nonfactor for Dallas. He also came off the bench in all seven games.
For reference, Curry averaged 31.8 minutes and 18.8 points per game in the same playoffs for the Philadelphia 76ers and started every game.
The Mavericks lost the trade for Richardson, and he didn't live up to the expectations Dallas had for him.