Forward Adam Cracknell was sent to Anaheim. Both players have played exclusively in the American Hockey League this season.
The 32-year-old Oleksy collected two assists in 15 games with the San Diego Gulls this year. He signed with Anaheim as a free agent on July 1, 2017.
Oleksy has 109 points in 388 career AHL games, including 20 with the Marlies during the 2016-17 season. He also has three goals and 17 assists in 73 career NHL games with Washington (2012-2015) and Pittsburgh (2016-17).
Cracknell was selected by Calgary in the ninth round (279th overall) of the 2004 NHL draft. He has three goals in 14 games with the Marlies this season.
The 33-year-old has 21 goals and 22 assists in 208 career NHL games with St. Louis, Columbus, Vancouver, Edmonton, Dallas and the New York Rangers and has one goal in 10 career Stanley Cup playoff games with the Blues.