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The Minnesota Twins placed right-handed reliever Joe Nathan on the 15-day disabled list on Saturday due to soreness in his surgically repaired elbow.

First-round draft pick Karsten Whitson declined to sign with San Diego by Monday night's deadline, leaving the Padres frustrated because they thought they'd have little trouble completing a deal with the right-hander.

"I'll be honest, we're really surprised," general manager Jed Hoyer said.

Red Sox pitcher Clay Buchholz hopes to make his next scheduled start despite an injured knee, though it could be delayed by a day or two.

The Boston Red Sox have placed Josh Beckett on the 15-day disabled list with a lower back strain.

Cardinals right-hander John Smoltz is being held out of his scheduled start Monday against the Florida Marlins because of shoulder tendinitis.

Smoltz, 1-1 with a 3.27 ERA in four starts with St. Louis after being released by the Boston Red Sox, said Saturday he expects to miss only one start.

His next scheduled outing is Sept.