Eagles beat writer Zach Berman on TE Zach Ertz: "Look for Ertz to be the primary receiving tight end next season. Ertz, the 2013 second-round pick, finished with 36 catches for 469 yards and four touchdowns last season and improved as the season progressed. I wouldn’t surprised if those numbers doubled in 2014. Ertz, 23, is a developing player with Pro Bowl potential."
The article also states that the Eagles consider Brent Celek a vital part of the team's running game, but that his salary (~$4 million) is high for a blocking TE. Celek has some ability in the passing game, but he's not the natural receiver that Ertz is. For his part, Ertz was a mediocre run blocker in his rookie season. Ertz's upside will be capped somewhat if Celek is still around in 2014.