SAN FRANCISCO — The San Francisco Giants placed outfielder Michael Conforto on the injured list with a Grade 2 left hamstring strain, the team announced Friday.

Recently-optioned outfielder Heliot Ramos was recalled from Triple-A Sacramento as the corresponding roster move.

When asked about a potential timeline for Conforto’s return, manager Gabe Kapler said he was “optimistic” that Conforto will return this season, adding they expect he’ll miss several weeks to recover from a Grade 2 strain. Conforto, 30, suffered the injury playing in the outfield during Wednesday’s game against the Phillies in Philadelphia.

That left hamstring troubled Conforto in June as he’s put together a mediocre first season with the Giants, batting .251/.343/.405 with 12 doubles and 15 home runs.

Kapler said Ramos, 23, was disappointed when optioned last week to make room for top pitching prospect Kyle Harrison, adding he had no major advice to hand down for things to work on. Ramos made an adjustment at the plate with his hands that’s translated to more hard contact than his previous big league stints. The outfielder has had a stellar year with the River Cats, batting .307 with a .935 OPS in 46 games.

John Brebbia pitched in a simulated game at Oracle Park complete with fake crowd noise blasting on the speakers prior to Friday’s game. He is expected to go on a rehab assignment, potentially in San Jose. Brebbia is on the 60-day IL has been out since June 17 with a right lat strain.