It also means they have some extra time to work players out.
Wilhelm is listed at 6'4", 245 pounds and some Chiefs fans may be familiar with him from his days with the San Diego Chargers, who made him a fourth round pick in the 2003 NFL draft. He's also spent time with the Philadelphia Eagles, San Francisco 49ers and Philadelphia Eagles.
Williams is listed at 6'2", 250 pounds and most recently had a stint with the Dallas Cowboys. Williams was drafted by the Cleveland Browns in the fourth round of the 2006 NFL draft and spent some time with the New York Sentinels (formerly the UFL).