Whoever made up the schedule did the Cubans no favors. They had to play last night at 8 against Canada, then return at noon today to face the Americans. If normal international procedure holds up, the Cubans will have expended every last ounce of energy against the Canadians, and are very likely to be sending this baby in today via the corner mailbox. "An L is an L," pointed out one veteran observer, "and the Cubans know they don't have any chance of beating the Americans, anyway." . . . Uruguay has a longstanding reputation as the kamikaze team of South America. The ferocious Uruguayans are no stranger to Olympic fisticuffs, but Brazilian star Oscar Schmidt says they have calmed down. "All those things were in the old days," he said . . . Names you might recognize include Bill Wennington, Leo Rautins and Mike Smrek for Canada; Stuart Gray and Lorenzo Charles for Panama; Carl Herrera for Venezuela; and Jose Ortiz and ex-Celtic Ramon Rivas for Puerto Rico.