"They were at the top of my list," said Leggett, who caught 45 passes for 606 yards and three TDs last year for the Raiders. "They were the first to offer me. I had no intentions of committing until I visited.
"I feel like it's a huge weight off my shoulders now."
Leggett recently ran a 4.78 in the 40-yard dash, which immediately caught the Clemson coaches' eyes. Allen, who Leggett eventually hopes to replace at Clemson, recently ran a 4.89 at the NFL combine.
"They want me to be a 3-back (H-back)," Leggett said. "They want me to basically replace Dwayne Allen. They told me they've have to switch up the whole offense if I didn't go there."
Leggett plans to schedule his five senior visits in the fall, but maintains he's a solid commitment to Clemson.
"I'm going to try to take my visits," Leggett said. "I'm going to take my senior visits to wherever I want to go.
"I'm solid on Clemson though. I'm happy with the decision."