Chicago White Sox general manager Ken Williams said today he may not be able to make a big trade this season because of smaller crowds at U.S. Cellular Field.

Williams also said he is unsure of right-hander Bartolo Colon's location ahead of a planned rehab start for Triple-A Charlotte on Thursday. Colon is on the 15-day disabled list with inflammation in his left knee.

Williams nearly pulled off a significant trade in May, putting together a deal to acquire Jake Peavy from the San Diego Padres. But the 2007 NL Cy Young Award winner used his no-trade clause to torpedo the agreement.