Miami attorney Michael Mueller won two appellate reversals for longtime client Tyson Foods Inc., wiping out $24 million in class action awards in two labor disputes.

The U.S. Court of Appeals for the Eighth Circuit ruled Aug. 26 that Tyson didn't specifically agree to pay employees for time spent donning and doffing protective equipment. Decisions in both cases came seven months after Mueller presented back-to-back oral arguments.

The Hunton & Williams partner has served as lead counsel in 35 Tyson wage-and-hour class actions since he began representing the Arkansas-based meat processing company in 1999. He said he believes he has brought more class actions to verdict than any other lawyer.