Miami is counting on a lot of unproven players, like Haywood Highsmith. The Miami Heat have largely stood pat this off-season. Subtract P.J. Tucker and add 2022 first-round pick Nikola Jovic, and Miami is bringing their roster from last season to this one. In a July episode of The Lowe Post, Jorge Sedano said that the Heat like their team and are willing to head into training camp without finding a replacement for P.J. Tucker. After a trip to the 2020 NBA Finals, the Heat signed Moe Harkless and Avery Bradley and lost Jae Crowder, but otherwise made no changes.…