Lawrence Michael Rotunda is a former American 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 (as Mike Rotunda) joined All Japan Pro Wrestling in the summer of 2000, shortly after the Pro Wrestling Noah exodus. He reunited the Varsity Club, this time with "Dr. Death" Steve Williams. The team won the 2000 World's Strongest Tag Determination League[13] and also challenged for the World Tag Team Championship, against Taiyō Kea and Johnny Smith on February 24, 2001, but lost. In late 2001, Rotunda returned to Team 2000 as part of the All Japan branch and returned to New Japan for one match, on October 28, teaming with Chono to defeat Tencozy. Rotunda finished the year teaming with Williams in the 2001 World's Strongest Tag Determination League, which they finished in 5th place with 6 points.

Rotunda retired from wrestling to run a security company with his wife in 2004.