On April 22, 2008 — John Smoltz becomes the 16th major league pitcher to strike out 3,000 batters. The 40-year-old Braves hurler gets Felipe Lopez swinging on a 2-2 offering in the 3rd for his 3,000th K. He is the 6th-quickest to the mark in terms of innings pitched (3,386). Smoltz fans 10 in 7 innings in this win, showing that age has not yet caught up to him.

Source
Baseball Reference April 22