Jennings recently joined the Bucks' G League affiliate, the Wisconsin Herd, after a season in China. In five games with the Herd, the 29-year-old averaged 20.4 points, eight assists, and two steals but shot just 32.2 percent from the field and 32.4 percent from 3-point range.
The Bucks drafted Jennings 10th overall in 2009, and he spent the first four years of his career in Milwaukee. He last played in the NBA during the 2016-17 season, averaging 7.1 points and 4.9 assists on .359/.313/.750 shooting between the New York Knicks and Washington Wizards.
The Bucks currently have a full roster, so they'll have to waive someone to make room for him.