5. Boban Marjanovic
Boban Marjanovic was a fan favorite during his time in Dallas, and almost every fan hated to see him leave in the Christain Wood trade, but he comes in as the fifth-worst starter since the start of the Luka Doncic era.
In 11 games started, Marjanovic averaged 13.6 points, 10.5 rebounds, 1.4 assists, and 0.7 blocks per game, although these stats are good, he is nowhere near a starting-caliber player in the NBA.
Marjanovic is not a good switch defender, and that allowed players to blow by him if they decided to switch in the pick and roll. He also got winded easily and wasn't effective for long before having to be subbed out.
Even though Marjanovic wasn't a starting-caliber player, he still had some big-time starts. He started in three games during the 2021 NBA Playoffs. He also stepped up when needed when Kristaps Porzingis was needed during the regular season.
Regardless of his play on the court, Marjanovic was a player who was a great fit in Dallas. He was an outstanding teammate and a great veteran presence in the locker room. Every team needs at least one of those guys, and Marjanovic excelled at being a great teammate.
Marjanovic wasn't a bad bench piece, but he shouldn't have been starting for the Mavs.