Los Angeles Rams

Los Angeles Rams wide receiver Puka Nacua (knee) is heading to the injured reserve after injuring his knee during Sunday's game against the Detroit Lions. He appeared to re-aggravate the bursa sac injury in his right knee, which he picked up in early August at training camp. The 23-year-old had a stellar rookie season, breaking the rookie receiving yards record, but will now miss at least four games. This is a massive blow to the Ram's offense, as Nacua won't be eligible to return until Week 6 against the Las Vegas Raiders. Cooper Kupp managers can expect him to see a huge target volume after seeing 21 targets in Week 1 with Nacua out most of the game. At the same time, Demarcus Robinson should see an uptick in targets as the Rams' No. 2 wide receiver with Nacua sidelined. Robinson is worth adding in most formats for managers looking for a replacement for Nacua.

Los Angeles Rams wide receiver Puka Nacua (knee) aggravated the right-knee injury he dealt with during training camp in the summer in the Week 1 regular-season opener on Sunday night at Ford Field in the overtime loss to the Detroit Lions. While Nacua is still going through additional testing on Monday after leaving Sunday's game early, he is expected to be considered week-to-week, according to sources. It's unclear exactly when the Rams and fantasy managers might get the 23-year-old second-year wideout back, but nobody should be expecting him to play in Week 2 against the division-rival Arizona Cardinals. Nacua was dealing with a bursa-sac injury in his knee back in camp. With Nacua leaving on Sunday, Cooper Kupp caught a league-high 14 passes on 21 targets for 110 yards and a touchdown, so his value will rise for however long Nacua is out. Demarcus Robinson and Tyler Johnson figure to see bigger roles as well.

Los Angeles Rams wide receiver Puka Nacua (knee) will undergo testing on his knee Monday afternoon after leaving Sunday night's game against the Detroit Lions. According to Ian Rapoport, the star receiver is scheduled to get some testing done after injuring the same knee that he tweaked during the preseason. Nacua was able to come back for one play in Sunday night's game, but ultimately left again and did not return. There still hasn't been any word or speculation on what's wrong with his knee, so these tests should provide a clear picture of the extent of the injury. If he'll need to miss some time, Tyler Johnson did a good job filling in against the Lions, while Tutu Atwell and Jordan Whittington may also see some more snaps.

Los Angeles Rams rookie kicker Joshua Karty did not appear intimidated by a large crowd and raucous road atmosphere in his first NFL game at the Lions on Sunday night. The Stanford rookie made both of his field goals, including a 41-yarder, and buried both of his extra-point attempts. It was a good sign that Karty could be a viable fantasy kicker this season. He looked smooth and unfazed in both of his field goal attempts, albeit in a controlled indoor environment at Ford Field. There could be some growing pains along the way for Karty but he looks like an NFL-ready kicker as the Rams probably expected after selecting him with a sixth-round pick in this year's draft. With other solid kicker options out there, fantasy managers can take a bit of a wait-and-see approach with Karty, but he could end up being a useful fantasy option this season.

Los Angeles Rams wide receiver Tyler Johnson took advantage of Puka Nacua (knee) leaving the game early with some big catches against the Lions on Sunday night. Johnson caught five of his seven targets for 79 yards, including a 63-yard catch and run when he stopped on a dime and turned a short pass into a long gain. The Minnesota Golden Gophers product stepped into the void opposite star receiver Cooper Kupp when Nacua left the contest. With Nacua set to undergo testing Monday on his right knee, Johnson could be a popular waiver-wire addition should Nacua be forced to miss any time. Demarcus Robinson also saw seven targets in the game but Johnson looked like the greater big-play threat.