Atlanta (CNN) At least 10 NFL teams will send personnel to watch Colin Kaepernick's league-arranged workout Saturday, a league source with direct knowledge told CNN on Wednesday.

Of the "double-digit" teams committed to the workout and interview session, most, and probably all, will send directors of player personnel and scouts who rate NFL players. Those are the people who would typically evaluate a back-up player -- in this case a second- or third-string quarterback.

Kaepernick, a free agent who claimed the NFL and its teams colluded to keep him from playing following his refusal to stand during the National Anthem, tweeted Tuesday he's ready.

"I've been in shape and ready for this for 3 years, can't wait to see the head coaches and GMs on Saturday."

I'm just getting word from my representatives that the NFL league office reached out to them about a workout in Atlanta on Saturday. I've been in shape and ready for this for 3 years, can't wait to see the head coaches and GMs on Saturday. — Colin Kaepernick (@Kaepernick7) November 13, 2019

However, it is doubtful that general managers and head coaches will be present at the suburban Atlanta workout because many will be preparing or traveling for Sunday's or Monday's games.

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