Leading candidates for this role include left-hander David Huff and right-hander Yusmeiro Petit. In 44 career starts, Petit is 13-18 with a 4.91 ERA, including his 4-1 finish with the Giants last year. His totals are marginally better than Huff's figures as a starter (17-27, 5.57 in 54 starts).
Until last year, the Giants' starting rotation was so consistent and effective that keeping a long reliever was mostly unnecessary. Guillermo Mota occupied the role on the rare occasions when multiple innings had to be consumed.
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.