By Joseph Salvador Congratulations to the Ertz family! Zach and Julie Ertz announced Monday that they are expecting their first child. The announcement was made via social media posts that featured a pregnant Julie and Zach during a photoshoot. “Adding to our starting lineup…Baby Ertz!” the caption read. The couple posted the same picture and caption on their respective Instagram and Twitter accounts. Zach, a tight end for the NFL’s Arizona Cardinals, and Julie, a midfielder for the NWSL’s Angel City, are both accomplished athletes in their own right. Zach is a three-time Pro Bowler and won Su…