Table:
text: José María Olazábal
European Tour wins (23)
European Tour wins (23)
Date_ Tournament Winning_score Margin_of_victory Runners_up
7 Sep 1986 Ebel European Masters Swiss Open −26 (64-66-66-66=262) 3 strokes Anders Forsbrand
12 Oct 1986 Sanyo Open −15 (69-68-69-67=273) 3 strokes Howard Clark
19 Jun 1988 Volvo Belgian Open −15 (67-69-64-68=269) 4 strokes Mike Smith
25 Sep 1988 German Masters −9 (69-72-70-68=279) 2 strokes Anders Forsbrand, Des Smyth
26 Feb 1989 Tenerife Open −13 (69-68-68-70=275) 3 strokes José Maria Cañizares
30 Jul 1989 KLM Dutch Open −11 (67-66-68-76=277) Playoff Roger Chapman , Ronan Rafferty
7 May 1990 Benson & Hedges International Open −9 (69-68-69-73=279) 1 stroke Ian Woosnam

Question: How big was Olazabal's lead in winning the European Tour (23) German Masters under José María Olazábal?