Kostin (lower body) was activated off injured reserve Saturday.

Kostin (lower body) might return Saturday versus Dallas, according to Max Miller of NHL.com on Friday.

Head coach Ryan Warsofsky said Wednesday that Kostin (lower body) will likely return to game action shortly after the league's break for the 4 Nations Face-Off, Curtis Pashelka of The San Jose Mercury News reports.

Kostin (lower body) is working his way back to full fitness but is still not in the day-to-day category. Head coach Ryan Warsofsky told reporters Tuesday, "He's progressing. He's skating again," Warsofsky said. "He's a little ways away here, not really in a day-to-day category," per Sheng Peng of San Jose Hockey Now.

Kostin (lower body) will not join the Sharks for their five-game road trip, Sheng Peng of San Jose Hockey Now reports Monday.

Kostin (lower body) won't play Saturday versus Minnesota, per Curtis Pashelka of The San Jose Mercury News.

Kostin (upper body) was activated off injured reserve Friday, according to Curtis Pashelka of The San Jose Mercury News.

Kostin (upper body) was put on injured reserve Saturday, per Curtis Pashelka of The San Jose Mercury News.

Kostin (undisclosed) isn't expected to play Saturday versus Utah, according to Curtis Pashelka of The San Jose Mercury News.

Kostin (lower body) took line rushes on the second line and is expected to play Tuesday versus the Hurricanes, Sheng Peng of San Jose Hockey Now reports.