For now, all of this remains speculative. Sanders hasn’t publicly revealed the reason behind the switch to No. 12—but the number change only adds to the rookie's intrigue.

After months of waiting to hear his answer, the Pittsburgh Steelers and Aaron Rodgers signed a one-year contract worth up to $19.5 million with $10 million guaranteed and a $13.65 million base ...

Though Rodgers wore the No. 12 jersey for the majority of his career—and throughout his entire tenure with the Green Bay Packers—he has since switched to No. 8 on the Jets and Steelers.