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9/17/2013 7:21 P.M. ET

Scutaro's season could end prematurely

NEW YORK -- Giants manager Bruce Bochy hinted that injury-plagued second baseman Marco Scutaro might have to end his season prematurely.

Scutaro left Sunday's game at Los Angeles in the middle of the third inning with lower back tightness. But his left pinkie, which was mashed by a pitch from Pittsburgh's Tony Watson on June 11, also has resumed bothering him. That case of "mallet finger" caused Scutaro to miss six games, but he has played pretty regularly since returning.

Scutaro underwent an MRI Tuesday in New York to determine the extent of the finger ailment. Results of the test were not immediately known. But Bochy indicated that he didn't want to risk the possibility of Scutaro aggravating the finger.

Asked if the Giants might decide Scutaro's fate for him, Bochy replied, "We pretty much told him that today."

Bochy and the Giants' medical staff were expected to meet with Scutaro again to discuss his playing status.

Bochy mentioned that while Scutaro's finger could improve with offseason rest, his back might benefit from a customized offseason training regimen.

"A lot of core work will help get his back where it needs to be," Bochy said.

Scutaro, who was replaced by Tony Abreu in Tuesday's lineup, is batting .297 with 31 RBIs in 127 games.

Belt's day-night discrepancy evening out

NEW YORK -- Brandon Belt is in the process of making a statistical flaw look obsolete.

The Giants first baseman entered Tuesday's series opener against the Mets with a lopsided difference in his batting average at night (.324 in 91 games) and during the day (.213 in 47 games). The disparity has dwindled since Belt implemented the changes that have accounted for his second-half surge -- standing deeper in the batter's box and changing his grip on the bat.

Belt owns a five-game hitting streak in day games, batting .368 (7-for-19) in that span.

"As soon as I started figuring things out, my production got better," he said.

Belt wasn't certain how the day-night differences developed in the first place.

"I don't think there's anything you can do, except get some sleep," he said, joking. "It might be a matter of doing something a little different to make sure my body is awake and ready for the game."

Chris Haft is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.