2007-08: Michael St. Croix was chosen in the first round, 4th overall, of the 2008 WHL Bantam Draft by the Edmonton Oil Kings.
2008-09: In his first WHL action with the Oil Kings, St. Croix scored 1 goal and added 1 assist for 2 points in 2 games. St. Croix played most of the season with the Winnipeg Wild Midget AAA team, scoring 46 goals and adding 42 assists for 88 points in 35 games.
2009-10: In his WHL rookie season, St. Croix played in 66 games for the Oil Kings. He scored 18 goals and added 28 assists for 46 points. St. Croix played for Team Western at the 2010 World U-17 Hockey Challenge, scoring 4 goals and adding 1 assist for 5 points in 5 games.
2010-11: In 68 games for the Oil Kings, St. Croix scored 27 goals and added 48 assists for 75 points. In playoff games, he registered 1 goal. St. Croix was ranked 59th among North American skaters by Central Scouting in the final rankings and selected by the Rangers in the 4th round (106th overall) of the 2011 NHL Draft.
2011-12: St. Croix was the leading scorer for a dominant Edmonton Oil Kings team that captured their division and won the WHL’s playoff title; advancing to the Memorial Cup. St. Croix scored 45 goals with 60 assists and was plus-40 in 72 games with 49 penalty minutes. He scored 18 goals on the power play. In 20 playoff games he scored 7 goals with 12 assists and was plus-eight with 6 penalty minutes. The Oil Kings won 1 of 4 games at the Memorial Cup and St. Croix finished minus-two with 1 assist.
2012-13: St. Croix signed a three-year entry-level contract in September 2012 before returning to Edmonton for his fourth WHL season. He scored 37 goals with 55 assists in 72 games to lead the Oil Kings in points and was +30 with 36 penalty minutes. Edmonton finished first in the Central Division and reached the WHL finals against Portland. St. Croix scored 13 goals with 13 assists and was +17 with 14 penalty minutes in 22 playoff games.
2013-14: St. Croix skated in 13 games for Rangers’ AHL affiliate Hartford in his first pro season — spending most of the season with the ECHL’s Greenville Road Warriors. He was -5 with no points and 2 penalties playing for the Wolfpack. St. Croix scored 17 goals with 31 assists and was -3 with 12 penalty minutes in 53 ECHL regular season games for the Road Warriors. Greenville finished third in the South Division before reaching the Eastern Conference finals against Cincinnati. St. Croix scored 4 goals with 11 assists and was +7 with 6 penalty minutes in 18 playoff games.
2014-15: St. Croix played for the Greenville Road Warriors in the ECHL in his second pro season. The third-leading scorer for the Road Warriors, he scored 15 goals with 26 assists and was -10 with 44 penalty minutes in 59 games. Greenville missed the playoffs despite winning 39 of 72 games, finishing two points behind Orlando for the final spot in the competitive East Division.
2015-16: St. Croix was the fourth-leading scorer for the re-christened Greenville Swamp Rabbits in his third pro season. He scored 11 goals and was second to leading scorer Scott Fleming with 29 assists, finishing with an even plus/minus and 34 penalty minutes, in 66 regular season games. Greenville missed the ECHL playoffs, finishing last in the South Division.
St. Croix is a crafty forward with two-way skills. St. Croix is small, but is a good playmaker with very good hockey sense.
St. Croix spent his third pro season with the ECHL's Greenville Swamp Rabbits in 2015-16. He has proven to be a consistent playmaker at that level but his inability to see even limited ice time in the AHL in the past two seasons suggests that St. Croix' NHL potential is limited. He is likely to play out his career at the minor pro level or could attract interest from a European club as a potential free agent signee.