Former San Francisco 49ers quarterback Colin Kaepernick will hold a free-agent workout Saturday after the NFL sent a memo to all 32 teams with an invitation to send representatives, and the number of teams expected to attend is beginning to rise.
Kaepernick, who started the movement of athletes protesting racial injustice and police violence by taking a knee during the U.S. national anthem, last played during the 2016 season. He opted out of his contract with the Niners in March 2017 and alleged collusion by the league's owners after going unsigned.