Marvin Bagley, the nation's No. 1 prospect, will start an official visit to UCLA Monday.

As of now it's his last schedule visit, and most recruiting insiders believe he'll make a decision on his future -- whether he'll reclassify to 2017 and which school he'll attend -- fairly soon.

Bagley is thought to be mainly considering Duke, UCLA and USC.

The 6-11 athlete took an official visit to Duke a couple of weeks ago, during the second July evaluation period, and then USC during the third evaluation period of July.

He was supposed to officially visit Arizona last week but that trip was cancelled. The explanation we heard is that Arizona recognized they weren't getting him and cancelled it.

Bagley is also thought to be considering Kansas and Kentucky, but there is no plan for visits at this time.

The vastly talented power forward submitted paperwork to be reclassified to the 2017 class, which would make him eligible to enroll in college this fall. We continue to hear that's a distinct possibility. He could also, from what we've heard, go play overseas for a year and then be eligible for the NBA Draf.

Regardless of class or potentially playing overseas, Bagley is a likely candidate for the No. 1 pick, in either the 2018 or 2019 NBA Draft.

It was thought for a while during winter and spring that UCLA was the leader for Bagley, mostly because of his desire to remain in Los Angeles. Recently, though, the buzz has been about Duke and USC.

It has to bode fairly well for the Bruins that they get his last official visit -- at least the last visit we know about at this time.