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8/19/2014 7:44 P.M. ET

Panik's dislocated left pinkie recovering well

CHICAGO -- Recovering nicely from a dislocated left pinky, Giants second baseman Joe Panik was expected to be available to pinch-hit if necessary during Tuesday night's series opener against the Chicago Cubs.

Panik, who was injured Sunday, tested his finger by participating in pregame batting practice -- he homered during his first round of swings -- and taking about 25 swings off a tee. Joaquin Arias replaced Panik at second base, batting seventh.

Still on day-to-day playing status, Panik could return to the lineup as early as Wednesday.

"It's not going to be perfect," Panik said. "But it's getting better."

Panik hit .419 (18-for-43) in his previous 12 games to lift his batting average from .203 to .282.

Sanchez diagnosed with second concussion in month

CHICAGO -- Catcher Hector Sanchez was diagnosed with his second concussion in a month, prompting Giants manager Bruce Bochy to hint that the 24-year-old could miss the rest of the season.

Bochy said Tuesday that "it'll be a little while" before the switch-hitting Sanchez conceivably could rejoin the Giants.

Bochy emphasized that Sanchez's health is the Giants' primary concern.

"It's hard to rush a kid back and see this happening again," Bochy added.

Sanchez endured his latest mishap last Saturday, when a foul tip struck his catcher's mask while he was performing for Fresno in an injury rehabilitation game.

Bochy noted that Sanchez, who tends to endure more than his share of physical abuse, had switched from using a hockey goalie-style protective mask to a more traditional catcher's mask. The change, it was believed, would reduce Sanchez's chances of sustaining concussions.

Chris Haft is a reporter for MLB.com. Read his blog, Haft-Baked Ideas, and follow him on Twitter at @sfgiantsbeat. This story was not subject to the approval of Major League Baseball or its clubs.