They call it "ultimate fighting", not mma, & only list fighters from the ufc, but its in there.
From guinness world records 2007:.....................................................................................
Most ufc heavyweight titles won - 5, randy couture
Most ufc middleweight titles won - 5, frank shamrock
Most ufc welterweight titles won - 8, matt hughes
Tallest ufc fighter - 6'8, gan mcgee
Most ufc wins - 11, (tie) randy couture & chuck liddell
(Tito is listed as a brazilian fighting liddell in a side caption pic :-/)
Other interesting records:
Boxing:................................................................................
Longest world title fight - 42 rnds, sep 1906, joe gans(w) vs oscar nelson
Longest heavyweight title reign - 11 yrs, june 1937-mar 1949, joe louis (defended his title a record 25 times)
Longest undefeated run - 50 wins, 1 draw over 17 years, ricardo lopez
Most knockdowns in single fight - 14 times in 10 rnds, dec 1950, vic toweel(w) vs danny o'sullivan
Youngest world champ - 17, wilfred benitez (won WBA welterweight title mar 1976)
Most rounds in single fight - 276 rnds, (pre-queensberry) fight lasted 4 1/2 hrs, 1825, jack jones(w) vs patsy tunney
Tallest heavyweight champ - 7', WBA heavyweight titleholder nicolay valuev
Wrestling:.........................................................................
Largest mongolian wrestling tournament - 2,048 wrestlers, july 2004, bayanwula inner mongolia, china
Largest wrestling attendance - 190,000 at pyongyang stadium, apr 1995, n. Korea