Sanford Koufax ( ; born Sanford Braun; December 30, 1935) is a former American Major League Baseball (MLB) left-handed pitcher. He pitched 12 seasons for the Brooklyn/Los Angeles Dodgers, from 1955 to 1966. Koufax, at age 36 in 1972, became the youngest player ever elected to the Baseball Hall of Fame.

Can we draw the following conclusion?
Sanford Koufax regretted leaving baseball when he retired.

Choose your answer from:
 a). Yes
 b). It's impossible to say
 c). No