Northampton have made two emergency signings in Scotland loose forward Ross Beattie and former Bath prop Simon Emms to bolster their injury-hit squad.
Both Beattie and Emms will go straight into the first-team squad as Northampton struggle through an injury crisis that has ravaged the Saints' pack.
"With most of our pack out of action with injury, these players have got an opportunity to step in and make a case for a longer term contract next year," said Northampton operations director John Steele.
Beattie, the former Bristol captain with nine Scotland caps to his name, arrives at Franklin's Gardens from Celtic League side the Newport Gwent Dragons.
"I am delighted to be here. I am looking forward to the rest of the season," said the 27-year-old.
Emms, who has played for both Llanelli and Bath, added: "This is a fantastic opportunity for me. It's a big club in the Premiership and I'm really glad to be here."
Wales' acting head coach Rob Howley has given Sam Davies and Rory Thornton a boost ahead of the RBS 6 Nations by naming the uncapped Ospreys duo in his largely experienced squad for the Autumn Internationals.