Calvin Johnson's decision to retire came as a surprise to many, inlcuding Detroit Lions wide receiver Corey Fuller.

Johnson dropped hints about walking away from the game toward the end of the season and made the decision official in early March. He even mentioned the possibility to his teammates, including Fuller, earlier in this season.

However, MLive.com reports Fuller still was caught off-guard.

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"Every time he mentioned it to me, I kind of took it as a joke," Fuller said. "Like, 'Yeah, whatever. No you're not.' It wasn't until close the end of the season, when he said it -- he said it like two or three times -- like, 'Are you for real? Then after the season, when it came out, it was for real."

It's easy to understand why Fuller had doubts. After all, Megatron is just 30 years old, has made six consecutive Pro Bowls and finished 10th in the league with 1,214 receiving yards last season. However, injuries and the overall wear of tear on his body after nine NFL seasons led Johnson to walk away.

"It still hasn't hit me all the way yet," Fuller said. "I'm definitely going to miss him. Miss the jokes. Miss his presence."