Giants infielder Matt Duffy will start getting work at first base and could possibly be an option to start at the position by Saturday, CSN Bay Area reports.
Manager Bruce Bochy hopes to have Brandon Belt available to resume starting Monday, but it's possible Duffy will see some time at first base in the interim. He's been primarly a shortstop in the minors and hasn't seen any action at first base at any level of his professional career.
The Giants will use Buster Posey at first base Friday, with Hector Sanchez starting behind the plate and catching Tim Lincecum.