Klefbom, 26, is expected to miss two-to-three weeks with a shoulder injury.
Bouchard won't be available Wednesday against the Boston Bruins, but is expected to stick around with the team for at least a few days, head coach Dave Tippett said Wednesday.
The 20-year-old Bouchard is considered the Oilers' top defense prospect. He's contributed seven goals and 33 points through 50 games with Bakersfield this season.
Bouchard also mustered one goal in a seven-game stint with the Oilers during 2018-19. The Ontario native was selected 10th overall by Edmonton at the 2018 NHL Draft.