Colin Kaepernick Congratulates Eric Reid, Shoulda Been Signed Sooner!

Colin Kaepernick says he's THRILLED his pal, Eric Reid, is back in the NFL -- but claims the safety shoulda been signed WAY earlier.

"Congratulations to my brother [Eric Reid], an all pro safety who should have been signed the first day of free agency, who has signed a football contract," Kaep posted.

"He has was the FIRST person to kneel alongside me. Eric is a social justice warrior, continues to support his wife, two beautiful daughters and communities in need."

Kaep and Reid were teammates on the 49ers and have been good friends for a WHILE.

In fact, when the guys found themselves jobless after the kneeling demonstrations -- they hired the same lawyers to sue the NFL for collusion ... claiming they'd been blackballed.

As for Kaep's claim Reid shoulda been signed sooner, he's right -- Reid's just 26 years old, has a Pro Bowl on his resume AND had 67 tackles and 2 picks last season.

Reid's new teammate, Torrey Smith, also commented -- saying, "I’m excited. It shouldn’t have taken this long, a person with his talent."

"We all understand the reason why."