Rams defensive end Morgan Fox tore his ACL on Thursday, a source tells Tom Pelissero of NFL.com (on Twitter). Naturally, the injury will rule him out for the entire 2018 season. 
Fox appeared in all 16 games (376 snaps) for the Rams last season and tallied 2.5 sacks and 19 total tackles. Fox, 24 in September, was set to offer support off of the bench this season for L.A., behind the likes of Michael Brockers, Ndamukong Suh, and Aaron Donald.
The Rams may bring in another defensive lineman to compete for a job, but they could be able to get by with what they have in-house. Ethan Westbrooks and Dominique Easley figure to be heavy in the rotation while Day 3 picks John Franklin-Myers and Sebastian Joseph probably have improved odds of seeing the field this fall.
This week’s round of OTAs have been costly for teams as Fox is the third player to succumb to serious injury in recent days. Eagles linebacker Paul Worrilow and Chargers tight end Hunter Henry will also miss the entire season with ACL tears.