NFL's Eric Decker -- I Knocked Up My Famous Wife ... Again!

Finally, some good news for Eric Decker ... the NY Jets wide receiver just announced his famous country singer wife is pregnant with kid #2!

Jessie James Decker posted the obligatory celeb "I'm Preggo" announcement pic on Instagram with a little help from her hubby and their 11-month-old daughter Vivianne ... writing:

"Vivianne is so excited because she is going to be a big sister! We are over the moon about having another baby!!!"

Eric just appeared in Jessie's new music video for her single "Clint Eastwood" ... where he featured in a scene where the two were ALL OVER EACH OTHER in a mobile home trailer.