The increasingly bizarre world of Leeds United has taken another turn for the strange after it emerged that Massimo Cellino, their maverick new owner, has such a dislike of the number 17 it has turned him against one of the club’s key players who was born on that date.

Cellino is so suspicious of the number 17 that he had the seats at his former club, Cagliari, taken out and replaced with 16B. Now he has instructed the new Leeds head coach, Dave Hockaday, not to select Paddy Kenny after discovering that the goalkeeper’s birthday is on 17 May and concluding that he is bad luck for the Championship club. Kenny, the second-highest earner at Leeds on £10,000 a week, has been left at home while the other players embark on a pre-season trip to Italy and he will not play for the club again.

Cellino, who also has a fear of purple, has separate issues about Kenny allegedly being overweight but is said to have reacted emotionally when he found out the 36-year-old goalkeeper had a connection with the number 17.

The Italian’s superstition about that number is so strong he has told Hockaday it must not form part of the squad list next season. Michael Brown previously wore 17 for Leeds but was released at the end of the season.

The issue goes back to Cellino’s time in Italian football when he says there was only one occasion in 20 years that Cagliari won or drew a game on the 17th of a month. In a recent interview, he remembered that victory and put it down to him asking the club’s supporters to wear the dreaded purple to the game. “The whole stadium was purple on the 17th. We won because I think that bad luck is like algebra: minus and minus is positive. Purple and 17 … they became positive and we won. That’s the only time.”

Cellino completed his takeover of Leeds in April but only after an appeal against the Football League’s decision to try to block him entry on the grounds he had a previous conviction for fraud.

Since then, he has sacked Brian McDermott and unexpectedly brought in Hockaday, who had been out of work for eight months after leaving his previous club, Forest Green, on the back of a run of seven defeats in eight games.

Leeds are now embarking on a cost-cutting process that has seen the canteen at their training ground closed down, meaning the players have to take packed lunches or send out for sandwiches. The players are also being made to pay to have their kits washed. Hockaday will not have control of transfer business and Cellino intends to flood the squad with free signings and cheap Italian imports. Stuart Taylor, who left Reading at the end of the season, has joined Leeds to take over from Kenny.