Dak Prescott couldn't be happier to have a baby girl on the way ... revealing he was hoping to welcome a daughter with his girlfriend, Sarah Jane Ramos -- and there's a special reason behind it.
The Dallas Cowboys quarterback -- who went public with the huge news over the holiday weekend -- spoke with reporters about his growing family on Monday ... and he said he's absolutely stoked to become a papa.
"Super, super blessed to have that responsibility," Prescott said.