Big milestone for Brooks Koepka and Jena Sims -- the golf star and his model wife brought their child home this week ... 20 days after the baby boy was born.
The first-time parents shared the awesome news on Thursday ... posing with little Crew at the Jupiter Medical Center, where he spent nearly three weeks receiving treatment in the NICU.
Sims praised everyone involved in treating their son over that tough period ... calling the staffers "angels on earth.