Lawrence Michael "Mike" Rotunda (born 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. 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.
- NWA Florida Heavyweight Championship
- NWA Southern Heavyweight Championship (Florida version)
- NWA United States Tag Team Championship (Florida version)
- NWA World Tag Team Championship (Mid-Atlantic version)
- NWA World Television Championship
- NWA Canadian Television Championship
- WWF World Tag Team Championship