Holden, 30, had 14 goals and 46 points in 135 games over parts of two seasons with the Rangers. He had 12 points (three goals, nine assists) in 55 games this season.
The 30-year-Holden has 107 career points (35 goals, 72 assists) in parts of seven NHL seasons with the Columbus Blue Jackets, Colorado Avalanche and Rangers. He is slated to be an unrestricted free agent following the season.
O’Gara, 24, skated in eight games with the Bruins this season and 11 over the past two seasons. He has yet to score an NHL point.
O’Gara, who is expected to join the Rangers, has two goals and six assists in 43 games with the Providence Bruins of the American Hockey League this season.
He was a fifth-round selection in the 2011 draft.
–Field Level Media