And then there were 20.
Green, a four-star cornerback from Louisville (Ky.) Male, told BuckeyeSports.com he called OSU head coach Jim Tressel and assistants Jim Heacock and Taver Johnson to inform them of the news Sunday night.
Coming exactly three weeks after Heacock told Green an offer was on the way, the decision to pull the trigger ends a courtship that for the longest time was somewhat one-sided.
Green may not have gotten an offer until June, but he always liked Ohio State. He has been keenly aware of the program since his brother, Marcus, played on the defensive line for the Buckeyes earlier this decade. That Justin would have a chance to be a Buckeye did not become clear until recently, however.
"I was wondering," he said. "I didn't know if they were going to ever offer me, but they came through eventually."
"I didn't ever reveal it, but they've always been the leader. I just wanted to make sure it was the place for me. I wanted to look at other places to see what they had to offer as well."
He said last week he would prefer to take his recruitment slow and reiterated that plan after arriving home from Ohio State's one-day elite camp Friday night, but ultimately the pull of wearing scarlet and gray proved stronger than his desire to keep looking.
"After I got done talking to the coaches [Friday], I really wanted to make a commitment but I wanted to talk about it with my family first," he said Sunday night. "Ever since I was little, Ohio State has always been a program I've looked up to, but I really hadn't touched bases with the coaches. That's why I waited.
"I wanted to see how they would use me, how I fit into their plan."
As it turns out, they plan to use him as a cornerback. He plays running back and wide receiver along with defensive back for his high school team, and he said Ohio State coaches told him he might get some snaps at wide receiver in college.
He said his family believes Ohio State is a good fit for him, although his brother had yet to find out when he talked to us.
"I'll probably call him later," Green said. "I'm sure he'll be pretty happy about my decision."
The 5-11, 180-pounder is a member of the Scout 300 and the No. 21 cornerback prospect in the nation. He chose Ohio State over offers that included Alabama, Illinois, Kentucky, Louisville, Miami (Fla.), Tennessee and West Virginia.