Lawrence Michael "Mike" Rotunda born on March 30, 1958 is an American former professional wrestler, perhaps best known under the name Irwin R. Schyster or I.R.S. for short, a play on the abbreviation of the Internal Revenue Service. On according to recent study about his net wealth accumulation, his net worth hasn’t yet mentioned in any particular site. At present he works with the WWE as a road agent and makes occasional appearances on WWE shows as Irwin R. Schyster. Rotunda was a second-generation professional wrestler, as son-in-law of Blackjack Mulligan, and is the father of two successful third-generation wrestlers, Bray Wyatt and Bo Dallas.

He has been very much interested to the wrestling arena since very young age as he used to be a varsity wrestler at Syracuse University in New York. While he was never an All American, he did win the EIWA Championships in 1981 as a Heavyweight. After graduating from Syracuse, Rotunda began wrestling in 1981 as a face in Florida Championship Wrestling. He often teamed with his real life brother-in-law, Barry Windham. Rotunda and Windham joined the World Wrestling Federation as the U.S. Express in 1984. They won the WWF World Tag Team Championship twice, firstly from Dick Murdoch and Adrian Adonis in January 1985. From next year he had only few successes in his account. Later in 1986 he again returned to the WWF as a new version. Rotunda left the WWF in early 1987 and returned to Florida, where he won the NWA Florida Heavyweight Championship in March. There, he feuded with Sir Oliver Humperdink's "Shock Troops" stable. Later in the year, Rotunda joined the National Wrestling Alliance affiliate Jim Crockett Promotions, where he lingered at mid-card level as a face before turning heel and joining Kevin Sullivan's Varsity Club, a group of wrestlers with amateur wrestling credentials. Rotunda retired from wrestling to run a security company with his wife in 2004. Rotunda was rehired by WWE as a road agent in 2006, and has made guest appearances as Irwin R. Schyster.