The team returned the right-hander from his rehabilitation assignment at Double-A Birmingham on Friday, activated him from the disabled list and requested waivers for the purpose of granting his unconditional release. Loaiza, 36, was placed on the disabled list on June 12 with right shoulder inflammation, after he was signed to a one-year deal through the remainder of 2008 on June 4.
"He didn't get it done," said White Sox manager Ozzie Guillen. "I feel for him, it's not an easy call. But sooner or later, like I said a couple weeks ago, we have to make a decision for the ballclub and for him."
By bringing in Loaiza, the White Sox felt they had a solid candidate for long relief and a possible spot starter in case someone in the five-man rotation was sidelined. But Loaiza's fastball topped out around 80 mph, and his arm wasn't strong enough to work in the role the team had envisioned.
"Everything [wasn't] there," said Guillen of Loaiza, who allowed one earned run over three innings and three games for the White Sox. "[There were] setbacks -- throw one day and the next day, he was sore.
"Loaiza had a great career and a great year for the White Sox [in 2003]. But unfortunately, he wasn't what we expected. [General manager] Kenny Williams doesn't like to hold people hostage. We gave him the opportunity and we didn't like what we saw. Hopefully, we were wrong, and hopefully he finds another job."
Scott Merkin is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.