Robert Griffin III, fiancé welcome baby girl

July 4 (UPI) -- Free agent quarterback Robert Griffin III became a father Sunday after fiancé Grete Sadeiko gave birth to a baby girl.

Gloria was born at a healthy six-pounds and 12-ounces.

"Welcome to the world Gloria Griffin," Griffin wrote on Instagram.

"Your mommy is incredible! The way she pushed through delivering you into the world was the stuff of legend. Very simply put, Your mom is a certified baller!!! I am blessed to have your Mommy riding with me as we show each other what real love is and now we have you, our own little angel to raise. It is very rare to find something real in this world we live in. God is real and he has blessed your mommy and daddy beyond our wildest dreams. We found each other and we made you. We have Real Love. Real Happiness. Real Purpose. That is priceless. 7/2/17 #OurLittleAngel #Love#Happiness #KnowYourWhy #OneOfTheBestDaysOfOurLife."

Griffin and the Florida State track star were engaged in May in Florida. Griffin and Sadeiko also announced the pregnancy at that time. The 27-year-old Heisman Trophy winner completed 59.2 percent of his passes for 886 yards, two scores and three interceptions last season for the Cleveland Browns.

"Couldn't have done it without this man by my side, my backbone," Sadeiko wrote on Instagram. "Trying to make me laugh every way possible and keeping me entertained through all the pain and doing everything to make me smile and get through this. You deserve a medal baby!"

The Browns released Griffin in March. He has been linked to the New York Jets and Seattle Seahawks but has yet to sign for the 2017 season.