Northampton have signed American forward Cam Dolan as cover for the injured James Craig.
The 23-year-old No 8, who has made six appearances for the United States, joins the Saints from Life University RFC in Atlanta and he follows in the footsteps of his international team-mate Samu Manoa, who has become a Franklin's Gardens mainstay since joining the club in 2011.
"We've kept a close eye on Cam for a while and have been impressed by what we've seen," said Northampton coach Jim Mallinder.
"He's a player who has a lot of natural talent and the physical attributes it takes to succeed.
"We're not expecting Cam to be the finished article immediately.
"It has been sad to see James Craig ruled out for a while, but it has also given us the opportunity to bring Cam in and see how he develops."
Northampton have also revealed that wing Vasily Artemyev has left the club.
The 26-year-old Russian made 33 appearances for Northampton after joining them following the 2011 World Cup but is returning home with both marriage and a baby on the way.
Mallinder said: "We're sad to see Vasily leave, but totally understand his reasons.
"He has worked extremely hard in his time with us and has learned a great deal.
"Of course this leaves a bit of a hole in the squad and we will be bringing in someone to fill that gap in the not-too-distant future."