 In 35 games pitched for the Padres, he started six, had a 6–9 record and a 3.40 ERA in 90 innings.On March 18, 1964, it was announced that Sisler retired from baseball to join an Investment company.After his baseball career, Sisler was an executive with the investment firm A. G. Edwards for more than 30 years, reaching the level of vice-chairman.