London Welsh wing Phil Mackenzie, Leicester centre Andy Forsyth and Rotherham hooker Dan Baines will move to the Aviva Premiership club this summer.
They will follow fellow new arrivals Michael Paterson, Kirill Kulemin and Charlie Walker-Blair to Salford City Stadium.
"Andy is a very talented young player," Sale rugby director Steve Diamond said.
"He has played for Leicester numerous times and is very highly rated, but hasn't had as many opportunities in the first team at Leicester as he would like and he wants to impress.
"As regards Phil, he has played really well for London Welsh all season long. He's a real hard working lad, and I think he will fit in really well here next season.
"In terms of Dan, I believe he has been the best hooker playing in the Championship this season. He has got big passion, is very ambitious and wants to play in the Premiership."
- Sports & Recreation
- Aviva Premiership
- Andy Forsyth
- Kirill Kulemin