Diamondbacks put Johnson on the DL

Arizona pitcher Randy Johnson was put on the 15-day disabled list for the third time this season, sidelined Tuesday because of a sore back before his scheduled start at St. Louis. The Diamondbacks promoted right-hander Yusmeiro Petit from triple-A Tucson to pitch in Johnson’s place.

The 43-year-old left-hander said he doesn’t believe the injury is career-threatening.

“That hasn’t even been part of the conversation,” Johnson said. “I think when you’ve been around as long as I have, you manage whatever comes across. It’s just one more obstacle.”

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Pittsburgh Pirates reliever Salomon Torres filed a grievance against the team nearly four months ago, alleging he was induced into signing a below-market contract last year by promises the club would rent his baseball training complex in the Dominican Republic. Torres personally negotiated his $6.2-million, two-year deal in March 2006, when he was a setup reliever.

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Philadelphia pitcher Jon Lieber will undergo season-ending surgery on Friday to repair a ruptured tendon in his left foot.... Cincinnati activated outfielder Ryan Freel and designated catcher Chad Moeller for assignment.... Right-hander Jason Hirsh was put on the 15-day disabled list by Colorado, which purchased the contract of right-hander Matt Herges.... Cincinnati replaced bench coach Bucky Dent with Pat Kelly.... The Chicago White Sox put outfielder Scott Podsednik on the 15-day disabled list because of a strained left rib-cage muscle.