The clip shows Goodwin scoring a touchdown.
Goodwin told his social-media followers that the baby boy was delivered at 4 a.m. Sunday after "some complications".
Morgan also spoke on the "tragic experience" in an Instagram post, letting her followers know the couple "won't stop fighting and we won't give up on what God has in store for us".
San Francisco 49ers wide receiver Marquise Goodwin (11) catches a touchdown pass in front of New York Giants cornerback Janoris Jenkins (20) during the first half of an NFL football game in Santa Clara, Calif., Sunday, Nov. 12, 2017. "The pain (physically, mentally, & emotionally) that she has endured is unbelievable", Goodwin wrote.
As Goodwin ran into the end zone, he blew a kiss to the sky.More news: Israel downs Syrian drone over Golan
Both Goodwin and Goodwin-Snow are career athletes; they were stars on the track team at the University of Texas at Austin. "Please Pray for the Goodwin family".
Goodwin did not speak with the press after the game but revealed the tragedy in a heartbreaking Instagram post later in the day. "He had a wonderful game today".
I appreciate everyone who kept us in their prayers and constantly checked in on us. "This was truly and an fantastic experience and it was also a tragic experience", she wrote. "It's just important for us to remember that things happen for a reason, even though we may question ourselves 'why us.' Our faith is strong".