Pierzynski said he already had an appointment scheduled before General Manager Ken Williams passed along Reinsdorf's order to get his shaggy locks shorn.
"I let it grow every winter and get it cut in April or May," Pierzynski told the Chicago Tribune. "I'm too lazy in the off-season to get it cut."
White Sox Manager Ozzie Guillen said hair-length rules have been in effect since 1985.
"Rules are rules, and you have to follow them," Crede said.
The only problem for Crede, who has piled up 11 RBI already this season, is finding a barber.
"I've never had my hair cut in Chicago before," Crede said.