Two are out for an extended period of time and the third has yet to step on the field.
Danny Amendola is expected to be sidelined for the next 2-6 weeks to recover from his groin injury. Depending on the severity of a groin injury, and here's to hoping this is minor, it could stick with him for deeper into the season. Some receivers are able to play through it, like Stevie Johnson in his 2011 campaign, while it can end the season of others like last season's Greg Jennings.
Amendola was able to come back on the field for the second half of the Bills, so hopefully that means it's a minor injury and he could return for the Atlanta Falcons in Week 4. Hopefully he didn't further aggravate it by coming back, which would rest with the trainers for letting him suit up.
In my opinion, I think they should rest of Amendola until he's healthy. It's horrible timing that he happened to be injured in Week 1, alongside Shane Vereen, and it's unfortunate it had to happen to a guy who is labeled as injury-prone. Hopefully, they can rest him up until he's ready and he can help the Patriots over the second half of the season and into the playoffs.