Hubbs, 24, returns to Tulsa while maintaining his ECHL rookie status, after joining the Oilers near the end of the 2016-17 season. The Beaumont, Alberta native recorded five points (4g-1a) in his first 14 pro games, and notched his first career goal March 4 in a 3-2 shootout loss at Wichita. Hubbs previously played four seasons at the University of Alaska-Anchorage from 2013-17, where he totaled 31 points (14g-17a) in 123 college games.
Richardson, 23, started his college career with Boston College in 2013-14 where he scored two goals in four games, before transferring to the University of Connecticut. The rookie forward from Nanaimo, British Columbia tallied 41 points (14g-27a) in 92 games from 2014-17 for the Huskies, including career bests of six goals and 16 assists in 36 games as a senior.