2013-14: Spent his first full professional season with Lake Erie, tallying four points (1g/3a) in 46 games…Recorded his first professional goal and point on Feb. 5 at Grand Rapids…Missed 28 games during the season due to injury.
2012-13: Recorded 32 points (3g/29a) with a +31 plus/minus rating and 109 penalty minutes in 70 games for the Saskatoon Blades (WHL)…Siemens, who finished second on the Blades in plus/minus, posted a +41 mark over his final 51 contests after starting the year -10 through 19 games…He was +23 in the month of February…Ranked second on the Blades in PIM and his 32 points finished third among team defensemen…Added one assist in four playoff contests…Went on to appear in four games at the 2013 Memorial Cup tournament held in Saskatoon, tallying one assist.
2011-12: Served as team captain in his third full season with the Saskatoon Blades of the Western Hockey League…Recorded 28 points (6g/22a) with 91 penalty minutes in 57 games…Ranked fourth on the club in plus/minus (+12) and fifth in penalty minutes…Missed a month of action due to a head injury suffered on Feb. 4 vs. Medicine Hat…Appeared in four playoff games for the Blades, recording two points (1g/1a)…Joined the Lake Erie Monsters (AHL) after Saskatoon was eliminated and made his professional debut on March 31 at Texas…Dressed in three games for Lake Erie.
2010-11: Appeared in all 72 games for the Saskatoon Blades as a 17-year-old…Tallied 43 points (5g/38a) with a +40 plus/minus rating and 121 penalty minutes…Only Stefan Elliott (81) had more points among Blades defensemen…Ranked fourth on the team in PIM and was fifth in plus/minus…Went on to collect four points (1g/3a) in 10 playoff games…Participated in the CHL Top Prospects Game on Jan. 19 in Toronto…Was rated by NHL Central Scouting as the fourth-best North American defenseman in its final rankings for the 2011 Entry Draft…Was tabbed as the 10th best North American skater overall.
2009-10: Appeared in 57 games for Saskatoon as a 16-year-old, recording 20 points (3g/17a) and 87 PIM…Helped Canada to the gold medal at the 2010 Under-18 Ivan Hlinka Memorial with three points (1g/2a) in five games.
Personal: Duncan’s father, Errol, played football in the Edmonton Eskimos system in the Canadian Football League.