Ryan O'Bryne is going back to being a full-time college student -- at age 32.

O'Byrne played more than 300 games as a defenseman in the NHL, the last eight with the Toronto Maple Leafs, so he's used to going with the flow. But any adjustments teachers and students might have to make to the presence of the hulking O'Byrne are nothing compared to the adjustment he is making.

"It will be a transition period, no question," said O'Byrne, who took to Twitter on July 21 to officially announce his retirement from hockey.