The Rockies cannot install the netting before the end of this regular season or the playoffs because of various "engineering issues," according to the team's press release.
Here is the full text of the Rockies' statement:
"Ensuring the safety of our fans has always been our number one priority. In fact, the most important aspect of creating the best fan experience possible starts with the protection of our Coors Field guests.
"With that in mind, we felt it was important to let our fans know that we have been in discussions with vendors for the past several months with regard to expanded netting for the 2018 season at Coors Field.
"Beginning with vendor selection, this project is complex. There are engineering issues to address as well as decisions about height, material type, material color, cabling, length and location. In order to communicate the most complete information possible to our fans, we intend to make these determinations this offseason, all with fan safety in mind."