As it turns out, Blackshear grew up a fan of one of those schools.
"I was always a South Carolina fan growing up and that was my first offer -- so that was pretty cool," Blackshear said.
Interest in Blackshear is not limited to those two schools.
He is hoping to hear from some more SEC schools.
The 6-foot-5, 230-pound Blackshear has visited two schools.
"I've visited Clemson and South Carolina this season," he said. "Both visits were good experiences."
Blackshear feels good about the way he played this season, but said he still needs to get better.
"I think my sophomore season went great because I didn't think I was going to do as good as I did," he said. "I think I did a pretty good job. But as a sophomore, I have a lot of room to improve."
"I'm working hard on getting stronger, more explosive, and gaining some more weight."
Bluffton finished the season 12-2. Blackshear had 97 tackles, five sacks, 17 tackles for loss, two pass deflections, three fumble recoveries, a punt block, a field goal block, and two touchdowns on offense.
Update: Blackshear was offered by Clemson on Monday afternoon.