Huge WIN for Russell Wilson and Ciara -- the couple's baby son, Win, just took his very first steps ... and it went down at Seahawks practice!!
The NFL superstar quarterback shared news of the milestone on Wednesday ... posting pics of the 1-year-old walking from daddy to mommy with a huge grin on his face.
"Win’s first steps!" Wilson tweeted. "Witnessing Win walk at practice it hit me that God orders our steps."
"I realize I’m just a Rookie in the Game of Life.