The stadium's playing conditions left much to be desired. For most of the Expos' tenure, the playing surface was an extremely thin AstroTurf carpet, with only equally thin padding between it and the concrete floor. It was so hard on players' knees that visiting teams frequently ran at a nearby park. Longtime Expos trainer Ron McClain begged for a replacement, but the OIB was unwilling to spend the $1 million needed for a new surface. Before the roof finally arrived, players had to contend with huge patches of ice in early April or late September. Additionally, for most of the Expos' tenure, the padding on the fence was so thin that fielders risked severe injury by going after long fly balls. However, the OIB was also unwilling to replace the padding. By the 1990s, several free agents specifically demanded that the Expos be taken out of consideration due to the poor playing conditions.