Dallas Cowboys head coach Brian Schottenheimer addressed Marshawn Kneeland's passing on Wednesday ... saying the team's "heart is heavy" as it deals with the loss -- while also revealing the late defensive end's girlfriend, Catalina, is currently pregnant with the couple's child.
The first-year head coach met with the media coming off Dallas' bye week ... and opened up his availability by offering condolences to Marshawn's family and his girlfriend as they navigate the difficult situation.
Schottenheimer said they had the opportunity to "celebrate" Kneeland's life Tuesday night .