They should rest Kupp as long as is needed. The reality is we are not going to compete for a Super Bowl this season. Therefore, the top priority should be ensuring a complete, total, and successful rehab for Kupp, so that he can put this injury behind him, and that it does not become a nagging issue throughout his career or something that will perpetually carry a significant re-aggravation risk. Kupp is getting older. He should still have several good years left. But he was an older rookie to begin with, and is certainly starting to develop an injury history. If the offense was a disaster like last year, or if the Rams were getting rolled, I could see arguments to bring Kupp back ASAP to stave off a losing culture etc. But as things currently are, the team is building some nice momentum, the young WRs are getting meaningful experience and snaps in key roles, the team and passing game are competitive, and things are trending up. Let Cooper take his time. If he's ready by week 5, excellent.