Kaleb Tarczewski and Nick Johnson returned to Tucson last week to train at the Richard Jefferson Gymnasium. Tarczewski left the NBA G League (formerly the D League) at midseason and became a starter for Italy’s Armani Milano, the league champion, averaging 6.7 points and 5.1 rebounds. Johnson, who also left the G League at mid-season, was the sixth man for Germany powerhouse Bayern München, which finished 28-4. Johnson averaged 7.1 points, but has since decided to leave Bayern to play elsewhere in 2017-18.