Atlanta Braves pitcher Mike Hampton will miss his scheduled start on Saturday because of a sore back. Hampton, who apparently injured his back getting out of a hot tub in the SBC Park weight room, will be replaced by Jorge Sosa. Sosa has been solid for the Braves this season, sporting a 5-1 record with a 2.76 ERA in seven starts. Meanwhile, Hampton is 4-2 with a 2.51 ERA in 10 starts this season. The left- handed hurler spent time on the 15-day disabled list earlier this season with a left forearm injury.