The Seattle Seahawks told Colin Kaepernick not to bother coming to a planned workout unless he promised he would NOT continue his kneeling protest ... sources with knowledge of the situation tell TMZ Sports.
We're told the Seahawks had invited Kaep to a workout roughly 2 weeks ago to potentially take a job as Russell Wilson's backup QB ... but the plans hit a snag on Thursday.
Our sources say the team reached out to Kaepernick with specific questions about his kneeling protest -- and essentially wanted him to stipulate that if signed, he would NOT kneel during the 2018 season.