During his time in the Derby City, the 6-foot-1, 195-pound defensive back reduced his list to just one.
"I'm going to Louisville," Thompson told InsideTheVille.com on Sunday morning. "I gave them my solid commitment."
Thompson wasn't on Louisville's radar until the hiring of Kragthorpe as the program's 20th head coach nearly two weeks ago.
"I already knew he was a cool guy," said Thompson. "When I was there I told him that I trusted him and that I wanted to come play for him."
Thompson, who was hosted by linebacker Terrence Butler, was impressed by the complete package that Cardinal football has to offer.
"It was the people there, the facilities, the coaching staff - just everything really," he said.
Also a part-time wide receiver, Thompson caught 13 passes for 255 yards as a sophomore and returned five punts for 60 yards. On defense, Thompson made 26 tackles, intercepted four passes and broke up five passes.
"I'm coming in as a cornerback and a punt return guy," said Thompson, a Texas native. "They told me that I could possibly come in and start there this year."
Thompson also said that he believes another highly-rated junior college prospect, Scout.com four-star linebacker Brian Ellis, made a verbal commitment during his weekend stay.