What The average Year when Outcome is Winner one, ""?
Outcome Year Pro Slam Championship Surface Opponent in the final Score in the final
Bobby Riggs
17188888
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2-17188888-2
Pro Slam
Pro Slam
Runner-up 1942 US Pro Grass Don Budge 2–6, 2–6, 2–6
Winner 1946 US Pro Grass Don Budge 6–3, 6–1, 6–1
Winner 1947 US Pro Grass Don Budge 3–6, 6–3, 10–8, 4–6, 6–3
Runner-up 1948 US Pro Grass Jack Kramer 12–14, 2–6, 6–3, 3–6
Runner-up 1949 Wembley Pro Indoor Jack Kramer 6–2, 4–6, 3–6, 4–6
Winner 1949 US Pro Grass Don Budge 9–7, 3–6, 6–3, 7–5
SELECT AVG Year FROM table WHERE Outcome = winner
winner