Johnson definitely had his long-term health in mind when retiring in March at the age of 30.
Calvin Johnson opens up about concussions, painkillers in NFL
Johnson definitely had his long-term health in mind when retiring in March at the age of 30.
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Johnson definitely had his long-term health in mind when retiring in March at the age of 30.
Johnson definitely had his long-term health in mind when retiring in March at the age of 30.