In 2005, the STBA/STWBA merged and became known as Bowls Tasmania South (BTS). These are the Men’s Singles Champions that occurred before the merger.
Open Men
| YEAR | WINNER | CLUB |
|---|---|---|
| 1931-32 | W. Lyons | Buckingham |
| 1932-33 | W. Lyons | Buckingham |
| 1933-34 | W. Lyons | Buckingham |
| 1934-35 | G. Lyons | City |
| 1935-36 | C. Dunn | City |
| 1936-37 | E. Willis | Derwent |
| 1937-38 | R. Clark | City |
| 1938-39 | A.J. Herbert | City |
| 1939-40 | A.C. Rothwell | Derwent |
| 1940-41 | C. Bucirde | City |
| 1941-42 | L. Woodhouse | Buckingham |
| 1942-43 | S.C. Green | Derwent |
| 1943-44 | W. Lyons | Buckingham |
| 1944-45 | A.H. Cherry | City |
| 1945-46 | A.J. Herbert | City |
| 1946-47 | J. Donnelly | Derwent |
| 1947-48 | Not Held | |
| 1948-49 | J. O’Beirne | Sandy Bay |
| 1949-52 | Not Held | |
| 1952-53 | W. Lyons | Buckingham |
| 1953-59 | Not Held | |
| FROM 1960 KNOWN AS THE STBA OPEN SINGLES CHAMPIONSHIP FOR THE CHARLES R. OSBORNE MEMORIAL TROPHY | ||
| 1960-61 | V.L. Hooper | Derwent |
| 1961-62 | H.F. Andrews | Buckingham |
| 1962-63 | E.M. Hall | New Norfolk |
| 1963-64 | R. Garwood | Buckingham |
| 1964-65 | R.R. Peet | Royal Hobart |
| 1965-66 | G. Fry | Derwent |
| 1966-67 | J. Andrews | New Norfolk |
| 1967-68 | W.J. Keenan | City |
| 1968-69 | H.F. Andrews | Buckingham |
| 1969-70 | G. Fehlberg | Buckingham |
| 1970-71 | K.A. Pearce | Derwent |
| 1971-72 | H.F. Andrews | Buckingham |
| 1972-73 | W.G. Frost | Claremont |
| 1973-74 | K.A. Pearce | Derwent |
| 1974-75 | A. Schofield | Claremont |
| 1975-76 | J.F. Correy | Royal Hobart |
| 1976-77 | H. Dobson | Sandy Bay |
| 1977-78 | D. Coleman | Claremont |
| 1978-79 | E. Morse | Buckingham |
| 1979-80 | K.A. Pearce | Rosny Park |
| 1980-81 | L. Matthews | Derwent |
| 1981-82 | C. McKibben | Geeveston |
| 1982-83 | J. McKibben | Geeveston |
| 1983-84 | P. Hoffman | Derwent |
| 1984-85 | A. Buckley | Sandy Bay |
| 1985-86 | C. McKibben | Geeveston |
| 1986-87 | C. McKibben | Geeveston |
| 1987-88 | E. Murray | Claremont |
| 1988-89 | R. Coad | Geeveston |
| 1989-90 | D. Pepper | Buckingham |
| 1990-91 | K.A. Pearce | Rosny Park |
| 1991-92 | G. Fehlberg | Buckingham |
| 1992-93 | R. Muckridge | Buckingham |
| 1993-94 | I. Stuart | Cmt |
| 1994-95 | P. Harman | Sandy Bay |
| 1995-96 | B. Forsyth | Rosny Park |
| 1996-97 | R. Coad | Geeveston |
| FROM 1997 KNOWN AS THE STBA OPEN SINGLES CHAMPIONSHIP FOR THE J.D. CLARKE SHIELD | ||
| 1997-98 | P. Hoffman | Rosny Park |
| 1998-99 | C. McKibben | Sandy Bay |
| 1999-00 | R. Coad | Buckingham |
| 2000-01 | A. Bennett | Rosny Park |
| 2001-02 | C. McKibben | Sandy Bay |
| 2002-03 | P. Hoffman | Rosny Park |
| 2003-04 | A. Burne | Sandy Bay |
| 2004-05 | A. Vince | Sandy Bay |
Continued in Men’s Singles Champions (BTS)