According to ESPN, the Dallas Cowboys' Jerry Jones, Houston Texans' Bob McNair and New England Patriots' Robert Kraft are just three of those being required to give depositions and turn over all related information.
Last month, Kaepernick's attorney Mark Geragos confirmed that a collective bargaining agreement grievance was filed against the league, stating that owners colluded against the quarterback after he made a social statement by refusing to stand for the national anthem during the 2016 preseason. He opted out of his contract with the 49ers in the offseason and remains unsigned.
Regardless, it looks as if it's about to be a huge showdown, and one can only imagine what will end up being aired from those cellphone records and emails.
The request by Kaepernick's legal team was previously reported by other media outlets, including CBS and ESPN. This caused a stir among the players that saw most teams that weekend protest in some fashion during the Anthem.
A number of players followed Kaepernick's lead by taking a knee during the anthem previous year and this season.
Players from around the league have joined in Kaepernick's protest this season, which has drawn angry responses from President Donald Trump and others in his administration.
Jones has said he would bench any Cowboys player who protests during the anthem.
And so, Kaepernick is claiming that National Football League owners colluded against signing him, in a private agreement to try to keep his cause quiet and avoid any public backlash from fans and - more importantly - sponsors.