Jeffrey, 26, is coming off a Calder Cup championship with the Texas Stars last month. He recorded four goals and six assists for 10 points in 21 regular-season games with Texas, and added seven goals and five assists for 12 points in 19 playoff contests.
Jeffrey also had two goals and two assists in 34 NHL games between Dallas and Pittsburgh in 2013-14.
A native of Sarnia, Ont., Jeffrey has 56 goals and 108 assists for 164 points 203 career AHL games with Texas and Wilkes-Barre/Scranton, and was an AHL All-Star in 2010. In 124 NHL contests with Dallas and Pittsburgh, he has 17 goals and 14 assists for 31 points.
Jeffrey was originally selected in the sixth round of the 2007 NHL Entry Draft by Pittsburgh.
O’Reilly, 27, finished last season with Utica, tallying seven goals and 38 assists for 45 points in 52 games. He had one assist in 14 games with Magnitogorsk Metallurg of the KHL before returning to North America.
The Toronto, Ont., native has appeared in 113 NHL games, collecting 13 goals and 28 assists for 41 points in 113 games with Nashville, Phoenix and Pittsburgh. In 340 NHL games with Utica, Wilkes-Barre/Scranton, Portland and Milwaukee, O’Reilly has notched 64 goals and 246 assists for 310 points. He was an AHL All-Star in 2009 and 2010.
O’Reilly was originally drafted in the fifth round of the 2005 NHL Entry Draft by Nashville.
Sanguinetti, 26, spent the 2013-14 with Atlant Moscow Oblast of the KHL, where he recorded two goals and five assists in 15 games.
The Trenton, N.J., native has collected two goals and four assists in 45 NHL games with the New York Rangers and Carolina. In 277 AHL appearances with Hartford and Charlotte, Sanguinetti has notched 34 goals and 136 assists for 170 points, and was an AHL All-Star in 2010.
Sanguinetti was originally selected in the first round, 21st overall, of the 2006 NHL Entry Draft by the Rangers.