Rienzo signed a minor league deal with the Padres on Tuesday, Matt Eddy of Baseball America reports.
Rienzo was outrighted to Triple-A New Orleans on Wednesday.
Rienzo (knee) was reinstated from the DL on Thursday.
Rienzo was recalled from Triple-A New Orleans on Friday, Joe Capozzi of the Palm Beach Post reports.
White Sox optioned RHP Andre Rienzo to Triple-A Charlotte.
Rienzo is 4-5 with a rough 5.87 ERA and a 1.61 WHIP in 24 appearances this year for the White Sox. He should have another chance later on in the season.
Andre Rienzo has been moved to the White Sox bullpen.
Rienzo surrendered four earned runs in 4 1/3 innings on Saturday against the Twins, watching his ERA rise to 5.86. He will pitch in long relief now for Chicago, with Scott Carroll moving into the vacant rotation spot.
White Sox manager Robin Ventura said Monday that Andre Rienzo is still a member of the team's rotation "as of right now."
"We're still going over that. As of right now he is," Ventura said. "We'll continue to sit there and talk about it." Rienzo was tagged for four runs over 4 1/3 innings Saturday in a loss to the Twins and holds a 10.38 ERA over his last four starts. If the White Sox do make a move, Ventura said it would be Scott Carroll taking Rienzo's spot in the rotation.
Andre Rienzo was tagged for four runs over 4 1/3 innings Saturday in a loss to the Twins.
Rienzo held the Twins to one run over the first four innings before unraveling in his final inning of work. All told, he gave up seven hits and two walks while striking out three batters. After beginning the year 4-0, the 25-year-old has lost five straight starts. Even worse, he has allowed 17 runs in 14 innings over his last three starts. Needless to say, he's not a fantasy option.
Andre Rienzo surrendered six runs over six innings in Sunday's loss to the Royals.
In his first start since May 6, Rienzo showed why the White Sox were so willing to skip his last turn in the rotation. The right-hander served up two homers among his six hits allowed, and he also walked four. He's now 4-4 with a 5.67 ERA in 54 innings after starting the season 4-0.
Andre Rienzo's next turn in the rotation will be skipped following Tuesday's rainout.
Rienzo's next turn had been slated for Wednesday, but the White Sox have decided to keep everyone else on schedule and push the righty back to Sunday. He holds a 5.25 ERA over 48 innings for the Pale Hose this season.