Peavy is 5-9 with a 5.55 ERA in 29 games for the Giants this season, 21 of them starts. The 35-year-old veteran has 101 strikeouts in 116 2/3 innings.
Suarez, a 26-year-old rookie, has pitched in 16 games for San Francisco this season, including six starts. Suarez is 3-1 with a 4.20 ERA and 40 strikeouts in 55 2/3 innings.
David Adler is a reporter for MLB.com based in New York. Follow him on Twitter at @_dadler. This story was not subject to the approval of Major League Baseball or its clubs.