15.1 – Yusmeiro Petit, San Francisco Giants – July 22 through August 28, 2014 (as starting and relief pitcher over 8 games, 1st and 8th games as starting pitcher and 2nd through 7th games as a relief pitcher)
15.0 – Mark Buehrle, Chicago White Sox – July 18–28, 2009 (as starting pitcher, included one perfect game)
