The 2013 Vezina Trophy-winner missed 10 games after straining his groin on Dec. 8 against the Los Angeles Kings.
Bobrovsky got off to a rocky start this season, at one point saying he had "zero confidence", but has managed to put up a respectable 11-12-1 record, with a 2.52 goals-against average and a .916 save percentage in 25 games on the last place Blue Jackets.
Calvert suffered a lower-body injury in the third period of Tuesday night's win over the Dallas Stars. Calvert has six goals and one assist in 39 games this season.
Korpisalo got his first taste of NHL action in Bobrovsky's absence, playing in five games with a 1-4-0 record and an .886 save percentage and a 3.65 goals-against average.
He was drafted in the third round, 62nd overall, by the Blue Jackets in 2012.
If Bobrovsky is fully healed, he should have his hands full as the Eastern Conference-leading Washington Capitals are his team's next opponent come Saturday.