Sam McCaig examines the contenders for the prize.
Ryan Nugent-Hopkins, drafted by Edmonton first overall last June, was acknowledged as a top-end talent, but there were doubts as to whether he could withstand the rigours of the NHL. Many assumed the Oilers would send the 18 year old back to junior hockey to his develop strength.
But Nugent-Hopkins earnt a spot on the team in training camp, was rookie-of-the-month in October and November, and has racked up 35 points in 38 games
But he missed most of January after a shoulder injury, returned for two games and then was sidelined again with another shoulder injury. Now the rookie race is wide open again and a slew of hopefuls have emerged
Adam Henrique has been skating on New Jersey's top line and has tied Nugent-Hopkins for first place among first-year players with 35 points. Philadelphia's Matt Read is a non-traditional NHL rookie - he's an undrafted 25-year-old - but he leads all rookies with 16 goals and has 32 points.
Cody Hodgson has been a force on Vancouver's third line, and with 14 goals and 30 points while Gabriel Landeskog of Colorado is in the mix with 13 goals and 29 points
There is a good chance that Nugent-Hopkins returns with a flourish and wins the Calder Trophy, but it is not the slam dunk it appeared to be in the first half of the season.