The Chiefs ended up signing Draughn but here's a little more on the guys they didn't sign.
Baker is a 6'5", 295 pound defensive end who entered the league as an undrafted free agent with the Miami Dolphins after spending his collegiate career with Purdue. He has been with the Dolphins (and on the practice squad) for the last three seasons. The Dolphins released him last week when they claimed RB Steve Slaton off waivers.
Johnson is a 5'11", 215 pound running back who played at USC. He entered the league last year as an undrafted free agent and signed with the Tennessee Titans, before eventually landing on IR. He's well known because of an incident at USC when a barbell fell on him and he required multiple surgeries to fix a crushed vocal chord and adam's apple.
Powell is a former Kansas State running back who stands 5'9" and weighs 205 pounds. He went undrafted his year and spent time with the Arizona Cardinals.