» July 5, 1906:
At the Polo Grounds, Boston's Big Jeff Pfeffer and Christy Mathewson match zeros for eight innings before the Giants finally score in the 9th on a single by Sammy Strang. Matty allows six hits in the 1-0 win.
» September 3, 1906:
At the Polo Grounds, the Giants flatten the Beaneaters twice, 4-0 and 3-2. Christy Mathewson wins his 17th in the opener, beating a wild Big Jeff Pfeffer. Cy Seymour completes the scoring with a solo homer in the 8th inning. Hooks Wiltse, in relief of Red Ames, wins the nitecap.
» October 4, 1906:
Boston (NL) hurlers Vive Lindaman and Irv Young lose 3-2 and 2-1 to Brooklyn. The Beaneaters finish last with 102 losses. Four hardworking hurlers bear the brunt: Young and Gus Dorner each lose 25 games; Lindaman, 23; and Frank "Big Jeff" Pfeffer, 22.
» May 8, 1907: Frank Pfeffer of the Boston Doves pitches a 6-0 no-hitter against the Reds. He will be known as "Big Jeff" until his younger, and bigger, brother Ed "Jeff" Pfeffer becomes a star hurler for Brooklyn in 1913.
» February 11, 1911: The Cubs acquire 2B Dave Shean from Boston for 3B Scotty Ingerton and righty Big Jeff Pfeffer. The is the 2nd time that Boston has traded with the Cubs for Big Jeff.