Nike has signed LeBron James to a lifetime deal, in what is said to be the largest single-athlete endorsement in company history, James began with Nike before he graduated from high school.

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“We can confirm that we have agreed to a lifetime relationship with LeBron that provides significant value to our business, brand and shareholders,” Nike said in a statement. “We have already built a strong LeBron business over the past 12 years, and we see the potential for this to continue to grow throughout his playing career and beyond.”

According to sources Nike has made 13 versions of James’ signature shoe, and annual sales in 2015 for his line are estimated to top $400 million.