Fedun, 30, has appeared in 12 AHL games this season with Rochester and Texas, recording eight points (1-7=8). Since joining Texas, he has posted three points (1-2=3) in three games. He was acquired by Dallas from Buffalo in exchange for a conditional seventh-round selection in the 2020 NHL Draft on Nov. 10, 2018. He will wear number 42 with Dallas.
The blueliner has appeared in 46 regular-season NHL contests over five seasons with Edmonton, San Jose, Vancouver and Buffalo, registering 15 points (2-13=15). Fedun has amassed 179 points (41-138=179) in 349 AHL regular-season contests and posted eight points (4-4=8) in 31 Calder Cup Playoff contests.
The 6-foot, 200-pound native of Edmonton, Alberta was originally undrafted and signed as a free agent by Edmonton on March 8, 2011.
Gleason, 20, has recorded one assist (0-1=1) in four NHL contests with Dallas this season. He has also registered eight points (2-6=8) in 13 AHL games this season with Texas.
The 6-foot-1, 185-pound native of Ortonville, Mich. was signed as an undrafted free agent with Dallas on Sept. 13, 2018.