13, I think. Sorry for being pedantic. Happy to be wrong.
It appears we're both wrong
In the 1971–72 season, Lee set a British record for the number of penalties scored in a season, with 15 of his 35 goals scored from the penalty spot. Many of the penalties resulted from fouls on Lee, earning him the nickname Lee One Pen. Some journalists, holding the opinion that Lee gained a number of penalties by diving, used the name Lee Won Pen instead.[4] Lee's name is often cited in debates about diving in football; referees' chief Keith Hackett described him as a player who "had a reputation of falling down easily".[5]