D'Amigo, 23, appeared in 22 games with Toronto last season, finishing with one goal and three points. He made his NHL debut on Dec. 5, 2013 against the Dallas Stars. D'Amigo also had 17 goals and 29 points in 70 games with the American Hockey League's Toronto Marlies.
The native of Binghamton, N.Y., has 57 goals and 118 points in 240 AHL games, all with the Marlies. The Maple Leafs selected him in the sixth round (No. 158) at the 2009 NHL Draft,
Frattin, 26, has 17 goals and 35 points in 126 NHL games with Columbus, the Los Angeles Kings and Maple Leafs. He was acquired by the Blue Jackets from the Kings on March 5, 2014 and had one assist in four games with Columbus after scoring two goals and finishing with six points in 40 games with the Kings, Los Angeles acquired him from Toronto last summer in the trade that sent goaltender Jonathan Bernier to the Maple Leafs.