He said "butt" and "scratch" in the same paragraph

Randy Johnson placed on DL with back injury

BALTIMORE (AP) -- Randy Johnson was placed on the 15-day disabled list by the Arizona Diamondbacks on Friday night with muscle tightness.

It is the second time this season the 43-year-old Johnson has been on the disabled list. He started the year on the DL while recovering from offseason back surgery.

He will be replaced on the roster by right-hander Enrique Gonzalez.

Johnson felt tightness in his buttocks muscle while playing catch, Arizona manager Bob Melvin said. He was scheduled to pitch against the Baltimore Orioles on Saturday, but was scratched before the game Friday night.