Players who crossed the divide
CONNACHT TO LEINSTER
The winger has yet to start a Heineken Cup game since leaving Connacht in 2011, even with a slew of back-three injuries this season. He backed himself to make the big time, but has faded into the background, although he has made 22 starts in the Pro12.
Played 50 times in his two years with Connacht before retracing his steps and moving back to Leinster, where he got his start in the Academy. Since returning to Dublin at the start of last season, the prop has started 14 games and come on in another 14. He has made only one Heineken Cup appearance, though.
The South African prop was signed by Connacht from University of Cape Town in 2004 and quickly became a regular with the side, earning over 50 caps. He signed for Leinster in the summer of 2007, but never really made a mark and was released last year.
Had two spells with Connacht before joining Leinster in 2005. He also played with Sale Sharks, with whom he won the European Challenge Cup. He joined Leinster in 2005 and retired in 2010. Won Celtic league (2008) and Heineken Cup (2009) medals. He suffered hugely with injuries as a Leinster player.
Has played with Munster, Connacht and Leinster and could be on his way back out West following the rise to prominence of Richardt Strauss. He played twice for Munster before joining Connacht in 2008. He signed for Leinster before the 2011 World Cup and scored a try in last season's Heineken Cup final win over Ulster. He has played 33 times (16 as starter) for Leinster and has 23 Ireland caps.
CONNACHT TO MUNSTER
The out-half has seen quite a lot of game time because of the IRFU restrictions on Ronan O'Gara's availability. Last season, he played more games for Munster than O'Gara. But when the big matches come around, he is very much in the back-up role. The jury is out on whether his 2011 move will turn out to be a success.
He is from Limerick, but spent two seasons with Connacht before rejoining Munster in 2003. He went on to win two Heineken Cup medals, plus a Grand Slam with Ireland. He was Ireland's first-choice hooker before injury forced him to quit the game last season.
CONNACHT TO ULSTER
Since joining from Connacht at the start of the 2011-12 season, the back- row forward has started nine games and come off the bench in another 11. He has made just two Heineken Cup appearances, one as a starter.