Retiring 41 consecutive batters, Bobby Jenks breaks David Wells’s American League record (38) and ties the major league mark established by Jim Barr of the Giants, who retired 41 straight batters in 1972. The White Sox closer reached the record book by pitching a perfect ninth inning against the Mariners.

On August 12, 2007 — Retiring 41 consecutive batters, Bobby Jenks breaks David Wells’s American League record (38) and ties the major league mark established by Jim Barr of the Giants, who retired 41 straight batters in 1972. The White Sox closer reached the record book by pitching a perfect ninth inning against the Mariners.

Source:
Baseball Reference August 12
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game