Shining Arcs will have Greig Laidlaw, Liam Gill and Anaru Rangi in their squad when the Top League season gets under way in 2021.
Lyon have confirmed the signing of towering lock Izack Rodda, who refused to take a pay cut to remain in his homeland.
Lyon and Toulouse were both winners in Sunday's Top 14 action, with Patricio Fernandez impressing for the former.
Lyon surrendered first place in Top 14 as they lost away to Bordeaux-Begles, who won a contest that was closer than the scoreline suggests.
Top 14 front-runners Lyon won again, while La Rochelle's Arthur Retiere grabbed a hat-trick and Brive left it late.
A thrashing of Lyon ensured Leinster made it five wins from five in the European Champions Cup, while Racing 92 reached the last eight.
There were wins for Lyon and Racing 92 in the Top 14 as Bordeaux-Begles were usurped at the summit.
Handre Pollard missed some crucial kicks on his Montpellier debut while Top 14 leaders Lyon
Lyon are reportedly targeting Ireland fly-half Johnny Sexton, but Leinster insist there has been no suggestion he will leave the province.
There were seven tries in Leinster's 43-16 European Champions Cup win over Northampton Saints as they made it 10 victories from 10.
Lyon's lead at the Top 14 summit was reduced to just one point as they were comprehensively beaten 33-8 by Montpellier on Saturday.
Racing 92, Northampton Saints and Connacht were all winners in Sunday's European Rugby Champions Cup action.
Wing Teddy Thomas put more pressure on Stade Francais coach Heyneke Meyer as Racing 92 came out on top in the Paris derby.
Jake McIntyre was accurate off the tee as Clermont Auvergne stopped Lyon in their tracks in Sunday's Top 14 encounter.
It was another game and another win for Lyon in Top 14, where Castres were defeated by Toulouse on Saturday.
Despite seeing their try line breached for the first time this season, Lyon maintained a 100 per cent start to the season in the... Read more