CALGARY, AB -- On Monday, the Calgary Flames tendered qualifying offers to six restricted free agents.

Chad Billins, Lance Bouma, Joe Colborne, Mark Cundari, Ben Hanowski, and Joni Ortio have all received qualifying offers.

Restricted free agents Paul Byron, TJ Galiardi, David Eddy, James Martin, and Olivier Roy did not receive qualifying offers.

Billins is coming off a 10-goal, 41-point season in the AHL. He led all Abbotsford Heat defencemen in scoring and was sixth in team scoring. He joined the Flames organization last summer, signing a one-year, two-way deal with the team on July 5, 2013.

Bouma played in 78 games with the Flames in the 2013-14 season, amassing five goals and 15 points. The Provost, AB native was Calgary's third round pick in the 2008 NHL Draft.

Colborne suited up for 80 games with the Flames in 2013-14, scoring 10 goals and 28 points. He was acquired by the Flames on Sept. 28, 2013 in trade that sent Calgary's fourth round pick in the 2014 NHL Draft to the Toronto Maple Leafs.

Cundari spent the majority of the 2013-14 season in AHL, splitting time between the Abbotsford Heat and Chicago Wolves. In total, he played 56 games in the AHL, notching nine goals and 23 points. The Flames acquired the defenceman from the St. Louis Blues on Apr. 1, 2013 in the trade that sent Jay Bouwmeester to Missouri.

Hanowski played 55 games for the Abbotsford Heat in his first professional season, scoring 13 goals and 31 points. The Little Falls, MN native was acquired on Mar. 28, 2013 from the Pittsburgh Penguins in the Jarome Iginla trade.

Ortio went 27-8-2 with the Abbotsford Heat last year and earned a stint in the NHL, going 4-4-0. He was the Flames sixth round selection in the 2009 NHL Draft.

Defenceman Shane O'Brien has been placed on unconditional waivers for the purposes of a buyout.