Robinson made significant strides during his second season in the NBA. He set career-highs essentially across the board, averaging 13.5 points, 3.2 rebounds and 1.4 assists in 29.7 minutes. He also established himself as one of the best shooters in the NBA, hitting 47.0 percent of his shots from the field, 44.6 percent of his shots from three and 93.1 percent of his shots from the free-throw line. He finished third in the league in made threes (270), fourth in three-point percentage and 17th in offensive rating (122.2). On Oct. 27, Robinson blocked a career-high two shots against the Timberwolves, and he'd reach that mark three more times during the season. On Nov. 16 in a win over the Pelicans, he swiped a career-high three steals and would reach that mark three more times during the campaign. In a win over the Nets on Dec. 1, Robinson grabbed a career-high 10 rebounds to go with 10 points. Nine days later in a win over the Hawks, the Michigan product scored a career-high 34 points to go with four assists and three rebounds. About a month later during a game against the Kings on Feb. 7, Robinson dished a career-high six assists to go with 18 points, five rebounds and one block. During the first three rounds of the playoffs against the Pacers, Bucks and Celtics, the second-year guard averaged 11.3 points, 2.8 rebounds and 1.5 assists. In the NBA Finals against the Lakers, he averaged 12.5 points, 2.7 rebounds and 2.5 assists. Arguably Robinson's best playoff performance was Game 2 against the Pacers, where he recorded 24 points (7-8 FG, 7-8 3Pt, 3-3 FT), two rebounds, two assists and one steal.

An undrafted free agent out of Michigan, Robinson spent his first NBA season on a two-way deal with the Heat and their G-League affiliate, the Sioux Falls Skyforce. He played in 15 games for Miami, starting once. Robinson averaged 3.3 points and 1.2 rebounds across 10.7 minutes per outing. Robinson totaled 50 points on 39.1 percent shooting, including 10-of-35 from long range. He tallied season highs across the board with 15 points, five rebounds, three assists and two steals in the Heat's last contest of the season, Apr. 10 at Brooklyn. Robinson enjoyed another solid game on Mar. 2, when he registered six points by virtue of 2-of-3 shooting from long range. He averaged 8.7 points, 2.7 rebounds and 1.7 assists in the three contests in which he logged at least 20 minutes of action. Robinson also scored at least four points on six occasions.