Speaking about the appointment Lam said:
"I'm delighted to confirm Gavin, John and Michael as Club Captains for the new season. We announced the captaincy to the entire squad today and the decision went down extremely well.
"In the professional era of rugby, when you have players joining your team from around the world and outside the province, it's important for everyone to understand the values of a Connacht player. Our own team identified those values as 'committed, tough, a team man, respected, and accountable.'
"These three men exemplify what Connacht Rugby is all about and they are fantastic ambassadors for the club. John and Gavin are both born and bred in Galway and Mayo and Michael is the longest serving player with a record number of caps. They care passionately about Connacht Rugby. They've seen where we've come from, they know where we are now and they want to be part of where we are going.
"They are all extremely committed and ambitions individuals and I know that they will continue to lead the squad with professionalism and passion. They act as a great support to the management team as well as the other players and there is a lot of respect there for them - both from within the club and from the supporters and the wider community."
Lam explained that the role of match day captain would be shared amongst the trio as well as other members of the squad:
"Each week we will put out our best, available team and will decide on the match day captain to lead us on the pitch.
"We have a larger leadership group working below the Club Captains which encourages players to take on more responsibility and allows us to build on the standards and progression of Connacht Rugby.
"There are a number of leaders here and I believe that we can all support each other very well over the coming season."
Mayo-born Gavin Duffy continues his duties for the third year as club captain after a successful two seasons that saw him lead Connacht in their first ever Heineken Cup campaign in 2011/12. The 31-year-old fullback-come-winger has been ever-present in the Connacht squad since his return to the province in 2007, following a four-year stint with London-based club Harlequins.
Duffy earned the first of his 10 Irish caps against South Africa in 2004 and played against Argentina in the 2007 World Cup. A former Mayo minor footballer who played in the 1999 All-Ireland Minor Football Final against Down, he went on to become one of the select few to join the elite group of Connacht Centurions by reaching 100 caps in 2010.
Galway man John Muldoon joins Duffy in leading the squad for 2013/14. The 31-year-old from Portumna has plenty of experience having captained Connacht for both the 2009/10 and 2010/11 seasons. In his first year as skipper, Muldoon led Connacht to victories over then Heineken Cup champions Leinster and Amlin Challenge Cup winners Cardiff Blues in the Magners League, along with helping his side to reach the semi-finals of the Amlin Challenge Cup where they lost narrowly to French outfit Toulon.
With three international caps to his name, Muldoon was most recently called up to the Irish squad during last November's Guinness Series. The back rower's campaign was cut short when he was forced off with an injury during the second half of Ireland XV's non-cap international against Fiji, which they won 53 - 0.
With 198 Connacht appearances, Muldoon is just two games shy of joining his teammate Michael Swift in the '200 club'.
In his fourteenth year with Connacht, Club Captain Swift continues to show his indisputable loyalty and commitment to the province. The 6'5 London-born second row joined Connacht in 2000 and earned his first cap against Ulster that year whilst also playing for Galwegians RFC in the All-Ireland league.
He became the first player in Connacht history to reach the 200th cap milestone when he lined out against Edinburgh in September 2011.
At the end of last season, Swift was presented with the prestigious Chairman's Award at the annual RaboDirect PRO12 Awards. The tournament Chairman Andy Irvine recognised Swift for "his outstanding service to both his province and the tournament as a whole." He became the first player to break the 150 game barrier last season and has played in every one of the 12 seasons of 'Celtic Rugby'. Swift has signed on for at least one more season with Connacht Rugby.
Pat Lam's men concluded their pre-season schedule at the weekend with the third friendly fixture against Newcastle Falcons, the Head Coach's former English club winning 23-10.
The squad will now have two weeks training before the first game of the RaboDirect PRO12 league. Italian side Zebre will be the first visitors to the Sportsground on Saturday, September 7th (KO 5pm) to get the 2013/14 season up and running.