Now he's eyeing more camps, and hopefully more offers.
Grinstead, the physical 6-foot-2 wideout, excelled at last week's Grambling State camp and came away with a full scholarship offer from the FCS school.
"They knew who I was and where I came from," Grinstead said of the Grambling coaches. "They put me at the top of the camp."
Grinstead told the Grambling coaches, however, that he wasn't ready to commit. Instead, he reiterated his desire to wait until the end of his senior season before pulling the trigger.
"They came and told me (about the offer) and asked me if I would want to commit or wait," Grinstead said. "I told them I wanted to talk to my mom and would wait until the end of my senior season."
Grinstead is hoping GSU isn't the only coaching staff impressed with him when they see him in person.
At 6-2 and 205 pounds, with a 4.5 40, Grinstead is a tough matchup for cornerbacks and expects to beat man-to-man coverage.
He'll get a chance to impress two other coaching staffs in Louisiana later this month. From July 16-19, he will attend Louisiana Tech's high school camp, and then will head to Baton Rouge to attend LSU's camp from July 20-23.
Grinstead wanted to attend a camp at the University of Georgia, his top choice, but said there isn't a way for him to get to Athens.
The Georgia Bulldogs' loss could be Louisiana Tech's game.
Grinstead said Tech assistant Eric Russell, who started recruiting him during the spring, is excited to see the big wide receiver in person.
"I call the recruiter from Louisiana Tech, and he told me he's looking forward to me coming to La. Tech," Grinstead said.