Getty One former NBA All-Star is back in the league, and his debut performance proves that age is really just a number. Players in the NBA often bounce between the big time and G League, but they’re not usually at the backend of their career. However, that’s the case with former Boston Celtics star Isaiah Thomas, who’s making another go at the NBA. Thomas signed with the Salt Lake City Stars of the G League, the affiliate of the Utah Jazz , and had his debut performance Tuesday night, January