Who on this roster can step up and provide backup PG minutes? Last season, the Dallas Mavericks reached the Western Conference Finals for the first time in eleven years. It was a magical run that made everyone feel really good about a squad that looked a bit shaky during the early days of the 2021-2022 season. After Kristaps Porzingis was sent to basketball purgatory, the Mavericks hit their stride, cruising to a 20-7 record (.740 win percentage) to close out the regular season. The previously maligned Spencer Dinwiddie averaged 15.8/3.1/3.9 on .498/.404/.725 splits, endearing himself to Mavs fans everywhere. Since…