"I'm coming back as fast as I can," he said Friday before Arizona's game against the Phillies.
Sexson was placed on the 15-day disabled list Thursday after an MRI exam showed a partially dislocated left shoulder and muscle tear.
He was injured on a check-swing in the eighth inning of Wednesday night's 4-3 loss to the Chicago Cubs. He fell to one knee and grabbed his non-throwing shoulder in pain before being led off the field by team physicians.
"I just felt it go out and come back in," Sexson said. "I felt like somebody stabbed me in the shoulder. It was a different kind of pain than I've ever felt."
Sexson played every inning of every game last season for the Milwaukee Brewers before being traded to Arizona in the offseason in a nine-player deal.
He leads the Diamondbacks and is among the league leaders with nine home runs and 22 RBIs. Earlier in the week, Sexson hit the longest home run homer in Bank One Ballpark history, an estimated 503 feet.
Arizona began a three-game series at Philadelphia with veteran Greg Colbrunn starting at first base and batting in Sexson's cleanup spot Friday night.
Hillenbrand is off to a sluggish start, batting under .200 coming into Friday night's game.
"He could help take up some of the slack if he starts swinging like we know he can," Brenly said.
To take Sexson's spot on the active roster, the Diamondbacks purchased the contract of outfielder Doug DeVore from Triple-A Tucson.
Copyright 2004 by The Associated Press
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