As Charania noted, there is a "belief among some teams" that Garland could have a promise from at least one franchise in the lottery.
According to Jonathan Givony of ESPN, he also didn't get measured in Chicago—along with presumptive top-three picks Zion Williamson, Ja Morant and RJ Barrett.
Garland is considered by "several NBA executives" to be the No. 4 prospect in the class, per Jon Rothstein of CBS Sports.
This would be an impressive jump, considering his college career only lasted five games before a meniscus injury ended his season early. Before that, he was rated the No. 14 overall player in the 2018 class, per 247Sports' composite rankings.
He performed well in his short stint at Vanderbilt, averaging 16.2 points per game, which included his 33-point effort against Liberty on 7-of-10 shooting from three-point range. His outside shooting is arguably his best trait, as he made 47.8 percent of his looks from beyond the arc last season while displaying extremely deep range.
On the other hand, the 6'2" prospect didn't show much of an ability to create, averaging just 2.6 assists to go with 3.0 turnovers per game.
He also has an extremely small sample size against top-level competition.
However, the top of the draft has several teams potentially interested in point guard help, especially the Phoenix Suns and Chicago Bulls. The Los Angeles Lakers could also be intrigued enough to take him at No. 4 overall.
Without going through workouts or giving measurements at the combine, he clearly feels confident he will be taken early.