Megna secured a two-year, $1.525 million contract with the Sharks on Monday.
Barabanov agreed to terms on a two-year contract extension with San Jose on Monday.
Simek (lower body) has joined the Czech Republic on Thursday ahead of the 2022 IIHF World Championships.
Knyzhov battled a groin injury in 2021-22, Sheng Peng of San Jose Hockey Now reports.
Kahkonen will start Friday on the road against the Kraken, Sheng Peng of San Jose Hockey Now reports.
Reimer will defend the blue paint during Thursday's road matchup with the Oilers, Sheng Peng of San Jose Hockey Now reports.
Chmelevski picked up an assist in Tuesday's 5-2 loss to the Ducks.
Megna posted an assist, two blocked shots and two PIM in Tuesday's 5-2 loss to the Ducks.
Leonard (lower body) is not expected to return this season, Sheng Peng of San Jose Hockey Now reports.
According to coach Bob Boughner, Karlsson (lower body) is likely done for the year, Sheng Peng of San Jose Hockey Now reports.
Kahkonen will start Tuesday against visiting Anaheim, Sheng Peng of San Jose Hockey Now reports.
Gadjovich (hand) will be in the lineup to face Anaheim on Tuesday, Sheng Peng of San Jose Hockey Now reports,
Pederson was recalled from AHL San Jose on Tuesday.
Reimer will defend the road crease Sunday in Vegas, Sheng Peng of San Jose Hockey Now reports.
Barabanov (undisclosed) won't play Thursday against the Blues, Sheng Peng of San Jose Hockey Now reports.
Viel (undisclosed) will return to the lineup for Thursday's game against the Blues, Sheng Peng of San Jose Hockey Now reports.
Reimer will patrol the crease during Thursday's home game versus the Blues, Sheng Peng of San Jose Hockey Now reports.
Karlsson (lower body) won't play Thursday against the visiting Blues, Sheng Peng of San Jose Hockey Now reports.
Hatakka was reassigned to AHL San Jose on Wednesday, per CapFriendly.
Viel (undisclosed) won't play Tuesday against the Blue Jackets, source reports.
Karlsson (lower body) remains day-to-day and will not play Tuesday against the visiting Blue Jackets, Curtis Pashelka of The San Jose Mercury News reports.
Hill (lower body) is slated to miss the remainder of the 2021-22 campaign, Sheng Peng of San Jose Hockey Now reports Tuesday.
Labanc (shoulder) has been officially ruled out for the remainder of the 2021-22 campaign, Sheng Peng of San Jose Hockey Now reports Tuesday.
Barabanov (undisclosed) won't play Tuesday against visiting Columbus, Sheng Peng of San Jose Hockey Now reports.
Megna (head) will return to the lineup Tuesday against the Blue Jackets, Sheng Peng of San Jose Hockey Now reports.