The Giants have Ramos on the taxi squad Tuesday, Justice delos Santos of The San Jose Mercury News reports.
Ramos is in Pittsburgh on Tuesday as rosters expand in September. The Giants recalled and selected Zach Morgan and Cesar Perdomo, respectively, Tuesday. San Francisco also transferred Adrian Houser (forearm) to the 60-day injured list. Since returning to Triple-A Sacramento at the beginning of July, Ramos has a 4.76 ERA and a 1.28 WHIP through 22.2 innings across 13 games.