Alexander-Walker was selected with the 17th overall pick in the 2019 NBA Draft. He made his NBA debut for the Pelicans Oct. 22 against the Raptors. In those 12 minutes, he posted three points, four rebounds, two assists and two steals. He had his first double-digit scoring effort and posted a career-high nine assists during the fourth game of the season, Oct. 28 against the Warriors. In those 24 minutes, the rookie posted 15 points, nine assists, four rebounds and one steal with just one turnover. Alexander-Walker scored a career-high 27 points Nov. 16 against the Heat. That game, he also posted four rebounds and three assists in 30 minutes. The 6-foot-5 guard's other single-game career highs were set at six three-pointers, five rebounds (three times), two steals (four times) and two blocks (twice). Before the hiatus, the Virginia Tech product averaged 5.1 points, 2.0 rebounds, 1.8 assists, 0.3 steals and 0.2 blocks in 12.2 minutes while shooting 33.9 percent from the field, 34.2 percent from three and 60.7 percent from the charity stripe. Alexander-Walker also appeared in two G League contests for the Erie BayHawks. Across 70 total minutes in the G League, he racked up 33 points, 12 rebounds, eight assists and two steals. The Pelicans were one of the 22 teams invited to participate in the restart of the NBA season within the Orlando bubble. Appearing in six of a possible eight seeding games, the rookie averaged 9.3 points, 2.5 assists and 1.0 steals in 15.0 minutes.